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4
README.md
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@ -20,7 +20,7 @@ Check out the [Examples page](https://mediapipe.readthedocs.io/en/latest/example
A web-based visualizer is hosted on [viz.mediapipe.dev](https://viz.mediapipe.dev/). Please also see instructions [here](mediapipe/docs/visualizer.md).
## Community forum
* [discuss](https://groups.google.com/forum/#!forum/mediapipe) - General community discussion around MediaPipe
* [Discuss](https://groups.google.com/forum/#!forum/mediapipe) - General community discussion around MediaPipe
## Publications
* [MediaPipe: A Framework for Building Perception Pipelines](https://arxiv.org/abs/1906.08172)
@ -29,7 +29,7 @@ A web-based visualizer is hosted on [viz.mediapipe.dev](https://viz.mediapipe.de
[Open sourced at CVPR 2019](https://sites.google.com/corp/view/perception-cv4arvr/mediapipe) on June 17~20 in Long Beach, CA
## Alpha Disclaimer
MediaPipe is currently in alpha for v0.5. We are still making breaking API changes and expect to get to stable API by v1.0.
MediaPipe is currently in alpha for v0.6. We are still making breaking API changes and expect to get to stable API by v1.0.
## Contributing
We welcome contributions. Please follow these [guidelines](./CONTRIBUTING.md).

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@ -1 +0,0 @@
theme: jekyll-theme-minimal

12
mediapipe/docs/examples.md
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@ -22,7 +22,7 @@ Android example users go through in detail. It teaches the following:
### Hello World! on iOS
[Hello World! on iOS](./hello_world_ios.md) is the iOS version of Sobel edge
detection example
detection example.
### Object Detection with GPU
@ -44,8 +44,9 @@ graphs can be easily adapted to run on CPU v.s. GPU.
[Face Detection with GPU](./face_detection_mobile_gpu.md) illustrates how to use
MediaPipe with a TFLite model for face detection in a GPU-accelerated pipeline.
The selfie face detection TFLite model is based on
["BlazeFace: Sub-millisecond Neural Face Detection on Mobile GPUs"](https://sites.google.com/view/perception-cv4arvr/blazeface).
[Model card](https://sites.google.com/corp/view/perception-cv4arvr/blazeface#h.p_21ojPZDx3cqq).
["BlazeFace: Sub-millisecond Neural Face Detection on Mobile GPUs"](https://sites.google.com/view/perception-cv4arvr/blazeface),
and model details are described in the
[model card](https://sites.google.com/corp/view/perception-cv4arvr/blazeface#h.p_21ojPZDx3cqq).
* [Android](./face_detection_mobile_gpu.md#android)
* [iOS](./face_detection_mobile_gpu.md#ios)
@ -71,8 +72,9 @@ MediaPipe with a TFLite model for hand tracking in a GPU-accelerated pipeline.
[Hair Segmentation on GPU](./hair_segmentation_mobile_gpu.md) illustrates how to
use MediaPipe with a TFLite model for hair segmentation in a GPU-accelerated
pipeline. The selfie hair segmentation TFLite model is based on
["Real-time Hair segmentation and recoloring on Mobile GPUs"](https://sites.google.com/view/perception-cv4arvr/hair-segmentation).
[Model card](https://sites.google.com/corp/view/perception-cv4arvr/hair-segmentation#h.p_NimuO7PgHxlY).
["Real-time Hair segmentation and recoloring on Mobile GPUs"](https://sites.google.com/view/perception-cv4arvr/hair-segmentation),
and model details are described in the
[model card](https://sites.google.com/corp/view/perception-cv4arvr/hair-segmentation#h.p_NimuO7PgHxlY).
* [Android](./hair_segmentation_mobile_gpu.md#android)

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mediapipe/docs/face_detection_mobile_gpu.md
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@ -4,22 +4,22 @@ This doc focuses on the
[example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/face_detection/face_detection_mobile_gpu.pbtxt)
that performs face detection with TensorFlow Lite on GPU.
![face_detection_android_gpu_gif](images/mobile/face_detection_android_gpu.gif){width="300"}
![face_detection_android_gpu_gif](images/mobile/face_detection_android_gpu.gif)
## Android
Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe.
The graph is used in the
[Face Detection GPU](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/facedetectiongpu)
example app. To build the app, run:
The graph below is used in the
[Face Detection GPU Android example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/facedetectiongpu).
To build the app, run:
```bash
bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/facedetectiongpu
```
To further install the app on android device, run:
To further install the app on an Android device, run:
```bash
adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/facedetectiongpu/facedetectiongpu.apk
@ -28,13 +28,13 @@ adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/a
## iOS
Please see [Hello World! in MediaPipe on iOS](hello_world_ios.md) for general
instructions to develop an iOS application that uses MediaPipe. The graph below
is used in the
[Face Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/facedetectiongpu).
instructions to develop an iOS application that uses MediaPipe.
To build the iOS app, please see the general
The graph below is used in the
[Face Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/facedetectiongpu).
To build the app, please see the general
[MediaPipe iOS app building and setup instructions](./mediapipe_ios_setup.md).
Specifically, run:
Specific to this example, run:
```bash
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/facedetectiongpu:FaceDetectionGpuApp
@ -42,11 +42,13 @@ bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/facedetectiongpu:Fa
## Graph
![face_detection_mobile_gpu_graph](images/mobile/face_detection_mobile_gpu.png){width="400"}
![face_detection_mobile_gpu_graph](images/mobile/face_detection_mobile_gpu.png)
To visualize the graph as shown above, copy the text specification of the graph
below and paste it into [MediaPipe Visualizer](https://viz.mediapipe.dev/).
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/face_detection/face_detection_mobile_gpu.pbtxt)
```bash
# MediaPipe graph that performs face detection with TensorFlow Lite on GPU.
# Used in the example in

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mediapipe/docs/hair_segmentation_mobile_gpu.md
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@ -1,25 +1,25 @@
# Hair Segmentation (GPU)
This doc focuses on the
[below example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hair_segmentation/hair_segmentation_android_gpu.pbtxt)
[example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hair_segmentation/hair_segmentation_mobile_gpu.pbtxt)
that performs hair segmentation with TensorFlow Lite on GPU.
![hair_segmentation_android_gpu_gif](images/mobile/hair_segmentation_android_gpu.gif){width="300"}
![hair_segmentation_android_gpu_gif](images/mobile/hair_segmentation_android_gpu.gif)
## Android
Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe.
The graph is used in the
[Hair Segmentation GPU](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/hairsegmentationgpu)
example app. To build the app, run:
The graph below is used in the
[Hair Segmentation GPU Android example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/hairsegmentationgpu).
To build the app, run:
```bash
bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/hairsegmentationgpu
```
To further install the app on android device, run:
To further install the app on an Android device, run:
```bash
adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/hairsegmentationgpu/hairsegmentationgpu.apk
@ -27,11 +27,13 @@ adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/a
## Graph
![hair_segmentation_mobile_gpu_graph](images/mobile/hair_segmentation_mobile_gpu.png){width="600"}
![hair_segmentation_mobile_gpu_graph](images/mobile/hair_segmentation_mobile_gpu.png)
To visualize the graph as shown above, copy the text specification of the graph
below and paste it into [MediaPipe Visualizer](https://viz.mediapipe.dev/).
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hair_segmentation/hair_segmentation_mobile_gpu.pbtxt)
```bash
# MediaPipe graph that performs hair segmentation with TensorFlow Lite on GPU.
# Used in the example in

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mediapipe/docs/hand_detection_mobile_gpu.md
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@ -2,30 +2,36 @@
This doc focuses on the
[example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_gpu.pbtxt)
that performs hand detection with TensorFlow Lite on GPU. This hand detection
example is related to
[hand tracking GPU example](./hand_tracking_mobile_gpu.md). Here is the
[model card](https://mediapipe.page.link/handmc) for hand detection.
that performs hand detection with TensorFlow Lite on GPU. It is related to the
[hand tracking example](./hand_tracking_mobile_gpu.md).
For overall context on hand detection and hand tracking, please read
[this Google AI blog post](https://mediapipe.page.link/handgoogleaiblog).
For overall context on hand detection and hand tracking, please read this
[Google AI Blog post](https://mediapipe.page.link/handgoogleaiblog).
![hand_detection_android_gpu_gif](images/mobile/hand_detection_android_gpu.gif){width="300"}
![hand_detection_android_gpu_gif](images/mobile/hand_detection_android_gpu.gif)
In the visualization above, green boxes represent the results of palm detection,
and the red box represents the extended hand rectangle designed to cover the
entire hand. The palm detection ML model (see also
[model card](https://mediapipe.page.link/handmc)) supports detection of multiple
palms, and this example selects only the one with the highest detection
confidence score to generate the hand rectangle, to be further utilized in the
[hand tracking example](./hand_tracking_mobile_gpu.md).
## Android
Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe.
The graph is used in the
[Hand Detection GPU](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handdetectiongpu)
example app. To build the app, run:
The graph below is used in the
[Hand Detection GPU Android example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handdetectiongpu).
To build the app, run:
```bash
bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/handdetectiongpu
```
To further install the app on android device, run:
To further install the app on an Android device, run:
```bash
adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handdetectiongpu/handdetectiongpu.apk
@ -34,13 +40,13 @@ adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/a
## iOS
Please see [Hello World! in MediaPipe on iOS](hello_world_ios.md) for general
instructions to develop an iOS application that uses MediaPipe. The graph below
is used in the
[Hand Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/handdetectiongpu)
instructions to develop an iOS application that uses MediaPipe.
To build the iOS app, please see the general
The graph below is used in the
[Hand Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/handdetectiongpu).
To build the app, please see the general
[MediaPipe iOS app building and setup instructions](./mediapipe_ios_setup.md).
Specifically, run:
Specific to this example, run:
```bash
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/handdetectiongpu:HandDetectionGpuApp
@ -48,17 +54,18 @@ bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/handdetectiongpu:Ha
## Graph
The hand detection graph is
[hand_detection_mobile.pbtxt](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_mobile.pbtxt)
and it includes a [HandDetectionSubgraph](./framework_concepts.md#subgraph) with
filename
[hand_detection_gpu.pbtxt](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_gpu.pbtxt)
shown as a box called `HandDetection` in purple
The hand detection [main graph](#main-graph) internally utilizes a
[hand detection subgraph](#hand-detection-subgraph). The subgraph shows up in
the main graph visualization as the `HandDetection` node colored in purple, and
the subgraph itself can also be visualized just like a regular graph. For more
information on how to visualize a graph that includes subgraphs, see
[visualizing subgraphs](./visualizer.md#visualizing-subgraphs).
For more information on how to visualize a graph that includes subgraphs, see
[subgraph documentation](./visualizer.md#visualizing-subgraphs) for Visualizer.
### Main Graph
![hand_detection_mobile_graph](images/mobile/hand_detection_mobile.png){width="500"}
![hand_detection_mobile_graph](images/mobile/hand_detection_mobile.png)
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_mobile.pbtxt)
```bash
# MediaPipe graph that performs hand detection with TensorFlow Lite on GPU.
@ -125,9 +132,15 @@ node {
}
```
![hand_detection_gpu_subgraph](images/mobile/hand_detection_gpu_subgraph.png){width="500"}
### Hand Detection Subgraph
![hand_detection_gpu_subgraph](images/mobile/hand_detection_gpu_subgraph.png)
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_gpu.pbtxt)
```bash
# MediaPipe hand detection subgraph.
type: "HandDetectionSubgraph"
input_stream: "input_video"

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@ -1,32 +1,41 @@
# Hand Tracking (GPU)
This doc focuses on the
[example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_android_gpu.pbtxt)
that performs hand tracking with TensorFlow Lite on GPU. This hand tracking
example is related to
[hand detection GPU example](./hand_detection_mobile_gpu.md). We recommend users
to review the hand detection GPU example first. Here is the
[model card](https://mediapipe.page.link/handmc) for hand tracking.
[example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_tracking_mobile.pbtxt)
that performs hand tracking with TensorFlow Lite on GPU. It is related to the
[hand detection example](./hand_detection_mobile_gpu.md), and we recommend users
to review the hand detection example first.
For overall context on hand detection and hand tracking, please read
[this Google AI blog post](https://mediapipe.page.link/handgoogleaiblog).
For overall context on hand detection and hand tracking, please read this
[Google AI Blog post](https://mediapipe.page.link/handgoogleaiblog).
![hand_tracking_android_gpu.gif](images/mobile/hand_tracking_android_gpu.gif){width="300"}
![hand_tracking_android_gpu.gif](images/mobile/hand_tracking_android_gpu.gif)
In the visualization above, the red dots represent the localized hand landmarks,
and the green lines are simply connections between selected landmark pairs for
visualization of the hand skeleton. The red box represents a hand rectangle that
covers the entire hand, derived either from hand detection (see
[hand detection example](./hand_detection_mobile_gpu.md)) or from the pervious
round of hand landmark localization using an ML model (see also
[model card](https://mediapipe.page.link/handmc)). Hand landmark localization is
performed only within the hand rectangle for computational efficiency and
accuracy, and hand detection is only invoked when landmark localization could
not identify hand presence in the previous iteration.
## Android
Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe.
The graph is used in the
[Hand Tracking GPU](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu)
example app. To build the app, run:
The graph below is used in the
[Hand Tracking GPU Android example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu).
To build the app, run:
```bash
bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu
```
To further install the app on android device, run:
To further install the app on an Android device, run:
```bash
adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/handtrackinggpu.apk
@ -35,13 +44,13 @@ adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/a
## iOS
Please see [Hello World! in MediaPipe on iOS](hello_world_ios.md) for general
instructions to develop an iOS application that uses MediaPipe. The graph below
is used in the
[Hand Tracking GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/handtrackinggpu)
instructions to develop an iOS application that uses MediaPipe.
To build the iOS app, please see the general
The graph below is used in the
[Hand Tracking GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/handtrackinggpu).
To build the app, please see the general
[MediaPipe iOS app building and setup instructions](./mediapipe_ios_setup.md).
Specifically, run:
Specific to this example, run:
```bash
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/handtrackinggpu:HandTrackingGpuApp
@ -49,20 +58,21 @@ bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/handtrackinggpu:Han
## Graph
For more information on how to visualize a graph that includes subgraphs, see
[subgraph documentation](./visualizer.md#visualizing-subgraphs) for Visualizer.
The hand tracking [main graph](#main-graph) internally utilizes a
[hand detection subgraph](#hand-detection-subgraph), a
[hand landmark subgraph](#hand-landmark-subgraph) and a
[renderer subgraph](#renderer-subgraph).
The hand tracking graph is
[hand_tracking_mobile.pbtxt](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_tracking_mobile.pbtxt)
and it includes 3 [subgraphs](./framework_concepts.md#subgraph):
The subgraphs show up in the main graph visualization as nodes colored in
purple, and the subgraph itself can also be visualized just like a regular
graph. For more information on how to visualize a graph that includes subgraphs,
see [visualizing subgraphs](./visualizer.md#visualizing-subgraphs).
* [HandDetectionSubgraph - hand_detection_gpu.pbtxt](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_gpu.pbtxt)
### Main Graph
* [HandLandmarkSubgraph - hand_landmark_gpu.pbtxt](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_landmark_gpu.pbtxt)
![hand_tracking_mobile_graph](images/mobile/hand_tracking_mobile.png)
* [RendererSubgraph - renderer_gpu.pbtxt](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/renderer_gpu.pbtxt)
![hand_tracking_mobile_graph](images/mobile/hand_tracking_mobile.png){width="400"}
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_tracking_mobile.pbtxt)
```bash
# MediaPipe graph that performs hand tracking with TensorFlow Lite on GPU.
@ -152,9 +162,15 @@ node {
}
```
![hand_detection_gpu_subgraph](images/mobile/hand_detection_gpu_subgraph.png){width="500"}
### Hand Detection Subgraph
![hand_detection_gpu_subgraph](images/mobile/hand_detection_gpu_subgraph.png)
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_detection_gpu.pbtxt)
```bash
# MediaPipe hand detection subgraph.
type: "HandDetectionSubgraph"
input_stream: "input_video"
@ -352,7 +368,11 @@ node {
}
```
![hand_landmark_gpu_subgraph.pbtxt](images/mobile/hand_landmark_gpu_subgraph.png){width="400"}
### Hand Landmark Subgraph
![hand_landmark_gpu_subgraph.pbtxt](images/mobile/hand_landmark_gpu_subgraph.png)
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/hand_landmark_gpu.pbtxt)
```bash
# MediaPipe hand landmark localization subgraph.
@ -532,7 +552,11 @@ node {
}
```
![hand_renderer_gpu_subgraph.pbtxt](images/mobile/hand_renderer_gpu_subgraph.png){width="500"}
### Renderer Subgraph
![hand_renderer_gpu_subgraph.pbtxt](images/mobile/hand_renderer_gpu_subgraph.png)
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/hand_tracking/renderer_gpu.pbtxt)
```bash
# MediaPipe hand tracking rendering subgraph.

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@ -14,7 +14,7 @@ graph on Android.
A simple camera app for real-time Sobel edge detection applied to a live video
stream on an Android device.
![edge_detection_android_gpu_gif](images/mobile/edge_detection_android_gpu.gif){width="300"}
![edge_detection_android_gpu_gif](images/mobile/edge_detection_android_gpu.gif)
## Setup
@ -56,7 +56,7 @@ node: {
A visualization of the graph is shown below:
![edge_detection_mobile_gpu_graph](images/mobile/edge_detection_mobile_graph_gpu.png){width="200"}
![edge_detection_mobile_gpu](images/mobile/edge_detection_mobile_gpu.png)
This graph has a single input stream named `input_video` for all incoming frames
that will be provided by your device's camera.
@ -252,7 +252,7 @@ adb install bazel-bin/$APPLICATION_PATH/edgedetectiongpu.apk
Open the application on your device. It should display a screen with the text
`Hello World!`.
![bazel_hello_world_android](images/mobile/bazel_hello_world_android.png){width="300"}
![bazel_hello_world_android](images/mobile/bazel_hello_world_android.png)
## Using the camera via `CameraX`
@ -369,7 +369,7 @@ Add the following line in the `$APPLICATION_PATH/res/values/strings.xml` file:
When the user doesn't grant camera permission, the screen will now look like
this:
![missing_camera_permission_android](images/mobile/missing_camera_permission_android.png){width="300"}
![missing_camera_permission_android](images/mobile/missing_camera_permission_android.png)
Now, we will add the [`SurfaceTexture`] and [`SurfaceView`] objects to
`MainActivity`:
@ -709,7 +709,7 @@ And that's it! You should now be able to successfully build and run the
application on the device and see Sobel edge detection running on a live camera
feed! Congrats!
![edge_detection_android_gpu_gif](images/mobile/edge_detection_android_gpu.gif){width="300"}
![edge_detection_android_gpu_gif](images/mobile/edge_detection_android_gpu.gif)
If you ran into any issues, please see the full code of the tutorial
[here](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/edgedetectiongpu).

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@ -72,7 +72,7 @@
This graph consists of 1 graph input stream (`in`) and 1 graph output stream
(`out`), and 2 [`PassThroughCalculator`]s connected serially.
![hello_world.cc graph](./images/hello_world_graph.png){width="200"}
![hello_world graph](./images/hello_world.png)
4. Before running the graph, an `OutputStreamPoller` object is connected to the
output stream in order to later retrieve the graph output, and a graph run

61
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@ -14,7 +14,7 @@ graph on iOS.
A simple camera app for real-time Sobel edge detection applied to a live video
stream on an iOS device.
![edge_detection_ios_gpu_gif](images/mobile/edge_detection_ios_gpu.gif){width="300"}
![edge_detection_ios_gpu_gif](images/mobile/edge_detection_ios_gpu.gif)
## Setup
@ -54,7 +54,7 @@ node: {
A visualization of the graph is shown below:
![edge_detection_mobile_gpu_graph](images/mobile/edge_detection_mobile_graph_gpu.png){width="200"}
![edge_detection_mobile_gpu](images/mobile/edge_detection_mobile_gpu.png)
This graph has a single input stream named `input_video` for all incoming frames
that will be provided by your device's camera.
@ -174,10 +174,11 @@ bazel build -c opt --config=ios_arm64 <$APPLICATION_PATH>:EdgeDetectionGpuApp'
```
For example, to build the `EdgeDetectionGpuApp` application in
`mediapipe/examples/ios/edgedetection`, use the following command:
`mediapipe/examples/ios/edgedetectiongpu`, use the following
command:
```
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/edgedetection:EdgeDetectionGpuApp
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/edgedetectiongpu:EdgeDetectionGpuApp
```
Then, go back to XCode, open Window > Devices and Simulators, select your
@ -188,9 +189,9 @@ blank white screen.
## Use the camera for the live view feed
In this tutorial, we will use the `MediaPipeCameraInputSource` class to access
and grab frames from the camera. This class uses the `AVCaptureSession` API to
get the frames from the camera.
In this tutorial, we will use the `MPPCameraInputSource` class to access and
grab frames from the camera. This class uses the `AVCaptureSession` API to get
the frames from the camera.
But before using this class, change the `Info.plist` file to support camera
usage in the app.
@ -198,7 +199,7 @@ usage in the app.
In `ViewController.m`, add the following import line:
```
#import "mediapipe/objc/MediaPipeCameraInputSource.h"
#import "mediapipe/objc/MPPCameraInputSource.h"
```
Add the following to its implementation block to create an object
@ -207,7 +208,7 @@ Add the following to its implementation block to create an object
```
@implementation ViewController {
// Handles camera access via AVCaptureSession library.
MediaPipeCameraInputSource* _cameraSource;
MPPCameraInputSource* _cameraSource;
}
```
@ -217,7 +218,7 @@ Add the following code to `viewDidLoad()`:
-(void)viewDidLoad {
[super viewDidLoad];
_cameraSource = [[MediaPipeCameraInputSource alloc] init];
_cameraSource = [[MPPCameraInputSource alloc] init];
_cameraSource.sessionPreset = AVCaptureSessionPresetHigh;
_cameraSource.cameraPosition = AVCaptureDevicePositionBack;
// The frame's native format is rotated with respect to the portrait orientation.
@ -229,10 +230,10 @@ The code initializes `_cameraSource`, sets the capture session preset, and which
camera to use.
We need to get frames from the `_cameraSource` into our application
`ViewController` to display them. `MediaPipeCameraInputSource` is a subclass of
`MediaPipeInputSource`, which provides a protocol for its delegates, namely the
`MediaPipeInputSourceDelegate`. So our application `ViewController` can be a
delegate of `_cameraSource`.
`ViewController` to display them. `MPPCameraInputSource` is a subclass of
`MPPInputSource`, which provides a protocol for its delegates, namely the
`MPPInputSourceDelegate`. So our application `ViewController` can be a delegate
of `_cameraSource`.
To handle camera setup and process incoming frames, we should use a queue
different from the main queue. Add the following to the implementation block of
@ -269,11 +270,11 @@ the interface/implementation of the `ViewController`:
static const char* kVideoQueueLabel = "com.google.mediapipe.example.videoQueue";
```
Before implementing any method from `MediaPipeInputSourceDelegate` protocol, we
must first set up a way to display the camera frames. MediaPipe provides another
utility called `MediaPipeLayerRenderer` to display images on the screen. This
utility can be used to display `CVPixelBufferRef` objects, which is the type of
the images provided by `MediaPipeCameraInputSource` to its delegates.
Before implementing any method from `MPPInputSourceDelegate` protocol, we must
first set up a way to display the camera frames. MediaPipe provides another
utility called `MPPLayerRenderer` to display images on the screen. This utility
can be used to display `CVPixelBufferRef` objects, which is the type of the
images provided by `MPPCameraInputSource` to its delegates.
To display images of the screen, we need to add a new `UIView` object called
`_liveView` to the `ViewController`.
@ -284,7 +285,7 @@ Add the following lines to the implementation block of the `ViewController`:
// Display the camera preview frames.
IBOutlet UIView* _liveView;
// Render frames in a layer.
MediaPipeLayerRenderer* _renderer;
MPPLayerRenderer* _renderer;
```
Go to `Main.storyboard`, add a `UIView` object from the object library to the
@ -296,7 +297,7 @@ Go back to `ViewController.m` and add the following code to `viewDidLoad()` to
initialize the `_renderer` object:
```
_renderer = [[MediaPipeLayerRenderer alloc] init];
_renderer = [[MPPLayerRenderer alloc] init];
_renderer.layer.frame = _liveView.layer.bounds;
[_liveView.layer addSublayer:_renderer.layer];
_renderer.frameScaleMode = MediaPipeFrameScaleFillAndCrop;
@ -308,7 +309,7 @@ To get frames from the camera, we will implement the following method:
// Must be invoked on _videoQueue.
- (void)processVideoFrame:(CVPixelBufferRef)imageBuffer
timestamp:(CMTime)timestamp
fromSource:(MediaPipeInputSource*)source {
fromSource:(MPPInputSource*)source {
if (source != _cameraSource) {
NSLog(@"Unknown source: %@", source);
return;
@ -322,7 +323,7 @@ To get frames from the camera, we will implement the following method:
}
```
This is a delegate method of `MediaPipeInputSource`. We first check that we are
This is a delegate method of `MPPInputSource`. We first check that we are
getting frames from the right source, i.e. the `_cameraSource`. Then we display
the frame received from the camera via `_renderer` on the main queue.
@ -337,7 +338,7 @@ about to appear. To do this, we will implement the
```
Before we start running the camera, we need the user's permission to access it.
`MediaPipeCameraInputSource` provides a function
`MPPCameraInputSource` provides a function
`requestCameraAccessWithCompletionHandler:(void (^_Nullable)(BOOL
granted))handler` to request camera access and do some work when the user has
responded. Add the following code to `viewWillAppear:animated`:
@ -413,7 +414,7 @@ Add the following property to the interface of the `ViewController`:
```
// The MediaPipe graph currently in use. Initialized in viewDidLoad, started in viewWillAppear: and
// sent video frames on _videoQueue.
@property(nonatomic) MediaPipeGraph* mediapipeGraph;
@property(nonatomic) MPPGraph* mediapipeGraph;
```
As explained in the comment above, we will initialize this graph in
@ -421,7 +422,7 @@ As explained in the comment above, we will initialize this graph in
using the following function:
```
+ (MediaPipeGraph*)loadGraphFromResource:(NSString*)resource {
+ (MPPGraph*)loadGraphFromResource:(NSString*)resource {
// Load the graph config resource.
NSError* configLoadError = nil;
NSBundle* bundle = [NSBundle bundleForClass:[self class]];
@ -440,7 +441,7 @@ using the following function:
config.ParseFromArray(data.bytes, data.length);
// Create MediaPipe graph with mediapipe::CalculatorGraphConfig proto object.
MediaPipeGraph* newGraph = [[MediaPipeGraph alloc] initWithGraphConfig:config];
MPPGraph* newGraph = [[MPPGraph alloc] initWithGraphConfig:config];
[newGraph addFrameOutputStream:kOutputStream outputPacketType:MediaPipePacketPixelBuffer];
return newGraph;
}
@ -498,7 +499,7 @@ this function's implementation to do the following:
```
- (void)processVideoFrame:(CVPixelBufferRef)imageBuffer
timestamp:(CMTime)timestamp
fromSource:(MediaPipeInputSource*)source {
fromSource:(MPPInputSource*)source {
if (source != _cameraSource) {
NSLog(@"Unknown source: %@", source);
return;
@ -518,7 +519,7 @@ The graph will run with this input packet and output a result in
method to receive packets on this output stream and display them on the screen:
```
- (void)mediapipeGraph:(MediaPipeGraph*)graph
- (void)mediapipeGraph:(MPPGraph*)graph
didOutputPixelBuffer:(CVPixelBufferRef)pixelBuffer
fromStream:(const std::string&)streamName {
if (streamName == kOutputStream) {
@ -535,7 +536,7 @@ method to receive packets on this output stream and display them on the screen:
And that is all! Build and run the app on your iOS device. You should see the
results of running the edge detection graph on a live video feed. Congrats!
![edge_detection_ios_gpu_gif](images/mobile/edge_detection_ios_gpu.gif){width="300"}
![edge_detection_ios_gpu_gif](images/mobile/edge_detection_ios_gpu.gif)
If you ran into any issues, please see the full code of the tutorial
[here](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/edgedetectiongpu).

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8
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@ -8,9 +8,9 @@ machine learning pipeline can be built as a graph of modular components,
including, for instance, inference models and media processing functions. Sensory
data such as audio and video streams enter the graph, and perceived descriptions
such as object-localization and face-landmark streams exit the graph. An example
graph that performs real-time hair segmentation on mobile GPU is shown below.
graph that performs real-time hand tracking on mobile GPU is shown below.
.. image:: images/mobile/hair_segmentation_android_gpu.png
.. image:: images/mobile/hand_tracking_mobile.png
:width: 400
:alt: Example MediaPipe graph
@ -29,11 +29,11 @@ APIs for MediaPipe
* (Coming Soon) Graph Construction API in C++
* Graph Execution API in C++
* Graph Execution API in Java (Android)
* (Coming Soon) Graph Execution API in Objective-C (iOS)
* Graph Execution API in Objective-C (iOS)
Alpha Disclaimer
==================
MediaPipe is currently in alpha for v0.5. We are still making breaking API changes and expect to get to stable API by v1.0. We recommend that you target a specific version of MediaPipe, and periodically bump to the latest release. That way you have control over when a breaking change affects you.
MediaPipe is currently in alpha for v0.6. We are still making breaking API changes and expect to get to stable API by v1.0. We recommend that you target a specific version of MediaPipe, and periodically bump to the latest release. That way you have control over when a breaking change affects you.
User Documentation
==================

4
mediapipe/docs/object_detection_desktop.md
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@ -44,7 +44,7 @@ $ bazel-bin/mediapipe/examples/desktop/object_detection/object_detection_tensorf
#### Graph
![graph visualization](images/object_detection_desktop_tensorflow.png){width="800"}
![graph visualization](images/object_detection_desktop_tensorflow.png)
To visualize the graph as shown above, copy the text specification of the graph
below and paste it into
@ -209,7 +209,7 @@ $ bazel-bin/mediapipe/examples/desktop/object_detection/object_detection_tflite
#### Graph
![graph visualization](images/object_detection_desktop_tflite.png){width="400"}
![graph visualization](images/object_detection_desktop_tflite.png)
To visualize the graph as shown above, copy the text specification of the graph
below and paste it into

33
mediapipe/docs/object_detection_mobile_cpu.md
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@ -1,8 +1,6 @@
# Object Detection (CPU)
Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe. This
doc focuses on the
This doc focuses on the
[example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/object_detection/object_detection_mobile_cpu.pbtxt)
that performs object detection with TensorFlow Lite on CPU.
@ -11,22 +9,25 @@ This is very similar to the
except that at the beginning and the end of the graph it performs GPU-to-CPU and
CPU-to-GPU image transfer respectively. As a result, the rest of graph, which
shares the same configuration as the
[GPU graph](images/mobile/object_detection_android_gpu.png), runs entirely on
[GPU graph](images/mobile/object_detection_mobile_gpu.png), runs entirely on
CPU.
![object_detection_android_cpu_gif](images/mobile/object_detection_android_cpu.gif){width="300"}
![object_detection_android_cpu_gif](images/mobile/object_detection_android_cpu.gif)
## Android
The graph is used in the
[Object Detection CPU](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectioncpu)
example app. To build the app, run:
Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe.
The graph below is used in the
[Object Detection CPU Android example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectioncpu).
To build the app, run:
```bash
bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectioncpu
```
To further install the app on android device, run:
To further install the app on an Android device, run:
```bash
adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectioncpu/objectdetectioncpu.apk
@ -35,13 +36,13 @@ adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/a
## iOS
Please see [Hello World! in MediaPipe on iOS](hello_world_ios.md) for general
instructions to develop an iOS application that uses MediaPipe. The graph below
is used in the
[Object Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/objectdetectioncpu).
instructions to develop an iOS application that uses MediaPipe.
To build the iOS app, please see the general
The graph below is used in the
[Object Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/objectdetectioncpu).
To build the app, please see the general
[MediaPipe iOS app building and setup instructions](./mediapipe_ios_setup.md).
Specifically, run:
Specific to this example, run:
```bash
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/objectdetectioncpu:ObjectDetectionCpuApp
@ -49,11 +50,13 @@ bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/objectdetectioncpu:
## Graph
![object_detection_mobile_cpu_graph](images/mobile/object_detection_mobile_cpu.png){width="400"}
![object_detection_mobile_cpu_graph](images/mobile/object_detection_mobile_cpu.png)
To visualize the graph as shown above, copy the text specification of the graph
below and paste it into [MediaPipe Visualizer](https://viz.mediapipe.dev/).
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/object_detection/object_detection_mobile_cpu.pbtxt)
```bash
# MediaPipe graph that performs object detection with TensorFlow Lite on CPU.
# Used in the example in

22
mediapipe/docs/object_detection_mobile_gpu.md
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@ -4,7 +4,7 @@ This doc focuses on the
[below example graph](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/object_detection/object_detection_mobile_gpu.pbtxt)
that performs object detection with TensorFlow Lite on GPU.
![object_detection_android_gpu_gif](images/mobile/object_detection_android_gpu.gif){width="300"}
![object_detection_android_gpu_gif](images/mobile/object_detection_android_gpu.gif)
## Android
@ -12,14 +12,14 @@ Please see [Hello World! in MediaPipe on Android](hello_world_android.md) for
general instructions to develop an Android application that uses MediaPipe.
The graph below is used in the
[Object Detection GPU](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectiongpu)
example app. To build the app, run:
[Object Detection GPU Android example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectiongpu).
To build the app, run:
```bash
bazel build -c opt --config=android_arm64 mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectiongpu
```
To further install the app on android device, run:
To further install the app on an Android device, run:
```bash
adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/apps/objectdetectiongpu/objectdetectiongpu.apk
@ -28,13 +28,13 @@ adb install bazel-bin/mediapipe/examples/android/src/java/com/google/mediapipe/a
## iOS
Please see [Hello World! in MediaPipe on iOS](hello_world_ios.md) for general
instructions to develop an iOS application that uses MediaPipe. The graph below
is used in the
[Object Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/objectdetectiongpu)
instructions to develop an iOS application that uses MediaPipe.
To build the iOS app, please see the general
The graph below is used in the
[Object Detection GPU iOS example app](https://github.com/google/mediapipe/tree/master/mediapipe/examples/ios/objectdetectiongpu).
To build the app, please see the general
[MediaPipe iOS app building and setup instructions](./mediapipe_ios_setup.md).
Specifically, run:
Specific to this example, run:
```bash
bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/objectdetectiongpu:ObjectDetectionGpuApp
@ -42,11 +42,13 @@ bazel build -c opt --config=ios_arm64 mediapipe/examples/ios/objectdetectiongpu:
## Graph
![object_detection_mobile_gpu_graph](images/mobile/object_detection_mobile_gpu.png){width="400"}
![object_detection_mobile_gpu_graph](images/mobile/object_detection_mobile_gpu.png)
To visualize the graph as shown above, copy the text specification of the graph
below and paste it into [MediaPipe Visualizer](https://viz.mediapipe.dev/).
[Source pbtxt file](https://github.com/google/mediapipe/tree/master/mediapipe/graphs/object_detection/object_detection_mobile_gpu.pbtxt)
```bash
# MediaPipe graph that performs object detection with TensorFlow Lite on GPU.
# Used in the example in

2
mediapipe/docs/visualizer.md
View File

@ -79,4 +79,4 @@ and its associated [subgraph](./framework_concepts.md#subgraph) called
* Click on the subgraph block in purple `Hand Detection` and the
`hand_detection_gpu.pbtxt` tab will open
![Hand detection subgraph](./images/clicksubgraph_handdetection.png){width="1500"}
![Hand detection subgraph](./images/click_subgraph_handdetection.png){width="1500"}

33
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@ -0,0 +1,33 @@
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.google.mediapipe.apps.handdetectiongpu">
<uses-sdk
android:minSdkVersion="21"
android:targetSdkVersion="27" />
<!-- For using the camera -->
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<!-- For MediaPipe -->
<uses-feature android:glEsVersion="0x00020000" android:required="true" />
<application
android:allowBackup="true"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:exported="true"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

83
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@ -0,0 +1,83 @@
# Copyright 2019 The MediaPipe Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
licenses(["notice"]) # Apache 2.0
package(default_visibility = ["//visibility:private"])
cc_binary(
name = "libmediapipe_jni.so",
linkshared = 1,
linkstatic = 1,
deps = [
"//mediapipe/graphs/hand_tracking:detection_mobile_calculators",
"//mediapipe/java/com/google/mediapipe/framework/jni:mediapipe_framework_jni",
],
)
cc_library(
name = "mediapipe_jni_lib",
srcs = [":libmediapipe_jni.so"],
alwayslink = 1,
)
# Maps the binary graph to an alias (e.g., the app name) for convenience so that the alias can be
# easily incorporated into the app via, for example,
# MainActivity.BINARY_GRAPH_NAME = "appname.binarypb".
genrule(
name = "binary_graph",
srcs = ["//mediapipe/graphs/hand_tracking:hand_detection_mobile_gpu_binary_graph"],
outs = ["handdetectiongpu.binarypb"],
cmd = "cp $< $@",
)
android_library(
name = "mediapipe_lib",
srcs = glob(["*.java"]),
assets = [
":binary_graph",
"//mediapipe/models:palm_detection.tflite",
"//mediapipe/models:palm_detection_labelmap.txt",
],
assets_dir = "",
manifest = "AndroidManifest.xml",
resource_files = glob(["res/**"]),
deps = [
":mediapipe_jni_lib",
"//mediapipe/java/com/google/mediapipe/components:android_camerax_helper",
"//mediapipe/java/com/google/mediapipe/components:android_components",
"//mediapipe/java/com/google/mediapipe/framework:android_framework",
"//mediapipe/java/com/google/mediapipe/glutil",
"//third_party:androidx_appcompat",
"//third_party:androidx_constraint_layout",
"//third_party:androidx_legacy_support_v4",
"//third_party:androidx_material",
"//third_party:androidx_recyclerview",
"//third_party:opencv",
"@androidx_concurrent_futures//jar",
"@androidx_lifecycle//jar",
"@com_google_code_findbugs//jar",
"@com_google_guava_android//jar",
],
)
android_binary(
name = "handdetectiongpu",
manifest = "AndroidManifest.xml",
manifest_values = {"applicationId": "com.google.mediapipe.apps.handdetectiongpu"},
multidex = "native",
deps = [
":mediapipe_lib",
],
)

167
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@ -0,0 +1,167 @@
// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.mediapipe.apps.handdetectiongpu;
import android.graphics.SurfaceTexture;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.util.Size;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import com.google.mediapipe.components.CameraHelper;
import com.google.mediapipe.components.CameraXPreviewHelper;
import com.google.mediapipe.components.ExternalTextureConverter;
import com.google.mediapipe.components.FrameProcessor;
import com.google.mediapipe.components.PermissionHelper;
import com.google.mediapipe.framework.AndroidAssetUtil;
import com.google.mediapipe.glutil.EglManager;
/** Main activity of MediaPipe example apps. */
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private static final String BINARY_GRAPH_NAME = "handdetectiongpu.binarypb";
private static final String INPUT_VIDEO_STREAM_NAME = "input_video";
private static final String OUTPUT_VIDEO_STREAM_NAME = "output_video";
private static final CameraHelper.CameraFacing CAMERA_FACING = CameraHelper.CameraFacing.FRONT;
// Flips the camera-preview frames vertically before sending them into FrameProcessor to be
// processed in a MediaPipe graph, and flips the processed frames back when they are displayed.
// This is needed because OpenGL represents images assuming the image origin is at the bottom-left
// corner, whereas MediaPipe in general assumes the image origin is at top-left.
private static final boolean FLIP_FRAMES_VERTICALLY = true;
static {
// Load all native libraries needed by the app.
System.loadLibrary("mediapipe_jni");
System.loadLibrary("opencv_java4");
}
// {@link SurfaceTexture} where the camera-preview frames can be accessed.
private SurfaceTexture previewFrameTexture;
// {@link SurfaceView} that displays the camera-preview frames processed by a MediaPipe graph.
private SurfaceView previewDisplayView;
// Creates and manages an {@link EGLContext}.
private EglManager eglManager;
// Sends camera-preview frames into a MediaPipe graph for processing, and displays the processed
// frames onto a {@link Surface}.
private FrameProcessor processor;
// Converts the GL_TEXTURE_EXTERNAL_OES texture from Android camera into a regular texture to be
// consumed by {@link FrameProcessor} and the underlying MediaPipe graph.
private ExternalTextureConverter converter;
// Handles camera access via the {@link CameraX} Jetpack support library.
private CameraXPreviewHelper cameraHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
previewDisplayView = new SurfaceView(this);
setupPreviewDisplayView();
// Initilize asset manager so that MediaPipe native libraries can access the app assets, e.g.,
// binary graphs.
AndroidAssetUtil.initializeNativeAssetManager(this);
eglManager = new EglManager(null);
processor =
new FrameProcessor(
this,
eglManager.getNativeContext(),
BINARY_GRAPH_NAME,
INPUT_VIDEO_STREAM_NAME,
OUTPUT_VIDEO_STREAM_NAME);
processor.getVideoSurfaceOutput().setFlipY(FLIP_FRAMES_VERTICALLY);
PermissionHelper.checkAndRequestCameraPermissions(this);
}
@Override
protected void onResume() {
super.onResume();
converter = new ExternalTextureConverter(eglManager.getContext());
converter.setFlipY(FLIP_FRAMES_VERTICALLY);
converter.setConsumer(processor);
if (PermissionHelper.cameraPermissionsGranted(this)) {
startCamera();
}
}
@Override
protected void onPause() {
super.onPause();
converter.close();
}
@Override
public void onRequestPermissionsResult(
int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
PermissionHelper.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
private void setupPreviewDisplayView() {
previewDisplayView.setVisibility(View.GONE);
ViewGroup viewGroup = findViewById(R.id.preview_display_layout);
viewGroup.addView(previewDisplayView);
previewDisplayView
.getHolder()
.addCallback(
new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
processor.getVideoSurfaceOutput().setSurface(holder.getSurface());
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// (Re-)Compute the ideal size of the camera-preview display (the area that the
// camera-preview frames get rendered onto, potentially with scaling and rotation)
// based on the size of the SurfaceView that contains the display.
Size viewSize = new Size(width, height);
Size displaySize = cameraHelper.computeDisplaySizeFromViewSize(viewSize);
// Connect the converter to the camera-preview frames as its input (via
// previewFrameTexture), and configure the output width and height as the computed
// display size.
converter.setSurfaceTextureAndAttachToGLContext(
previewFrameTexture, displaySize.getWidth(), displaySize.getHeight());
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
processor.getVideoSurfaceOutput().setSurface(null);
}
});
}
private void startCamera() {
cameraHelper = new CameraXPreviewHelper();
cameraHelper.setOnCameraStartedListener(
surfaceTexture -> {
previewFrameTexture = surfaceTexture;
// Make the display view visible to start showing the preview. This triggers the
// SurfaceHolder.Callback added to (the holder of) previewDisplayView.
previewDisplayView.setVisibility(View.VISIBLE);
});
cameraHelper.startCamera(this, CAMERA_FACING, /*surfaceTexture=*/ null);
}
}

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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/preview_display_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<TextView
android:id="@+id/no_camera_access_view"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"
android:text="@string/no_camera_access" />
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

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<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#008577</color>
<color name="colorPrimaryDark">#00574B</color>
<color name="colorAccent">#D81B60</color>
</resources>

4
mediapipe/examples/android/src/java/com/google/mediapipe/apps/handdetectiongpu/res/values/strings.xml Normal file
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<resources>
<string name="app_name" translatable="false">Hand Detection GPU</string>
<string name="no_camera_access" translatable="false">Please grant camera permissions.</string>
</resources>

11
mediapipe/examples/android/src/java/com/google/mediapipe/apps/handdetectiongpu/res/values/styles.xml Normal file
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<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>

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mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/AndroidManifest.xml Normal file
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<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.google.mediapipe.apps.handtrackinggpu">
<uses-sdk
android:minSdkVersion="21"
android:targetSdkVersion="27" />
<!-- For using the camera -->
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />
<uses-feature android:name="android.hardware.camera.autofocus" />
<!-- For MediaPipe -->
<uses-feature android:glEsVersion="0x00020000" android:required="true" />
<application
android:allowBackup="true"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity
android:name=".MainActivity"
android:exported="true"
android:screenOrientation="portrait">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

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mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/BUILD Normal file
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# Copyright 2019 The MediaPipe Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
licenses(["notice"]) # Apache 2.0
package(default_visibility = ["//visibility:private"])
cc_binary(
name = "libmediapipe_jni.so",
linkshared = 1,
linkstatic = 1,
deps = [
"//mediapipe/graphs/hand_tracking:mobile_calculators",
"//mediapipe/java/com/google/mediapipe/framework/jni:mediapipe_framework_jni",
],
)
cc_library(
name = "mediapipe_jni_lib",
srcs = [":libmediapipe_jni.so"],
alwayslink = 1,
)
# Maps the binary graph to an alias (e.g., the app name) for convenience so that the alias can be
# easily incorporated into the app via, for example,
# MainActivity.BINARY_GRAPH_NAME = "appname.binarypb".
genrule(
name = "binary_graph",
srcs = ["//mediapipe/graphs/hand_tracking:hand_tracking_mobile_gpu_binary_graph"],
outs = ["handtrackinggpu.binarypb"],
cmd = "cp $< $@",
)
# To use the 3D model instead of the default 2D model, add "--define 3D=true" to the
# bazel build command.
config_setting(
name = "use_3d_model",
define_values = {
"3D": "true",
},
)
genrule(
name = "model",
srcs = select({
"//conditions:default": ["//mediapipe/models:hand_landmark.tflite"],
":use_3d_model": ["//mediapipe/models:hand_landmark_3d.tflite"],
}),
outs = ["hand_landmark.tflite"],
cmd = "cp $< $@",
)
android_library(
name = "mediapipe_lib",
srcs = glob(["*.java"]),
assets = [
":binary_graph",
":model",
"//mediapipe/models:palm_detection.tflite",
"//mediapipe/models:palm_detection_labelmap.txt",
],
assets_dir = "",
manifest = "AndroidManifest.xml",
resource_files = glob(["res/**"]),
deps = [
":mediapipe_jni_lib",
"//mediapipe/java/com/google/mediapipe/components:android_camerax_helper",
"//mediapipe/java/com/google/mediapipe/components:android_components",
"//mediapipe/java/com/google/mediapipe/framework:android_framework",
"//mediapipe/java/com/google/mediapipe/glutil",
"//third_party:androidx_appcompat",
"//third_party:androidx_constraint_layout",
"//third_party:androidx_legacy_support_v4",
"//third_party:androidx_material",
"//third_party:androidx_recyclerview",
"//third_party:opencv",
"@androidx_concurrent_futures//jar",
"@androidx_lifecycle//jar",
"@com_google_code_findbugs//jar",
"@com_google_guava_android//jar",
],
)
android_binary(
name = "handtrackinggpu",
manifest = "AndroidManifest.xml",
manifest_values = {"applicationId": "com.google.mediapipe.apps.handtrackinggpu"},
multidex = "native",
deps = [
":mediapipe_lib",
],
)

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mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/MainActivity.java Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.mediapipe.apps.handtrackinggpu;
import android.graphics.SurfaceTexture;
import android.os.Bundle;
import androidx.appcompat.app.AppCompatActivity;
import android.util.Size;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import com.google.mediapipe.components.CameraHelper;
import com.google.mediapipe.components.CameraXPreviewHelper;
import com.google.mediapipe.components.ExternalTextureConverter;
import com.google.mediapipe.components.FrameProcessor;
import com.google.mediapipe.components.PermissionHelper;
import com.google.mediapipe.framework.AndroidAssetUtil;
import com.google.mediapipe.glutil.EglManager;
/** Main activity of MediaPipe example apps. */
public class MainActivity extends AppCompatActivity {
private static final String TAG = "MainActivity";
private static final String BINARY_GRAPH_NAME = "handtrackinggpu.binarypb";
private static final String INPUT_VIDEO_STREAM_NAME = "input_video";
private static final String OUTPUT_VIDEO_STREAM_NAME = "output_video";
private static final CameraHelper.CameraFacing CAMERA_FACING = CameraHelper.CameraFacing.FRONT;
// Flips the camera-preview frames vertically before sending them into FrameProcessor to be
// processed in a MediaPipe graph, and flips the processed frames back when they are displayed.
// This is needed because OpenGL represents images assuming the image origin is at the bottom-left
// corner, whereas MediaPipe in general assumes the image origin is at top-left.
private static final boolean FLIP_FRAMES_VERTICALLY = true;
static {
// Load all native libraries needed by the app.
System.loadLibrary("mediapipe_jni");
System.loadLibrary("opencv_java4");
}
// {@link SurfaceTexture} where the camera-preview frames can be accessed.
private SurfaceTexture previewFrameTexture;
// {@link SurfaceView} that displays the camera-preview frames processed by a MediaPipe graph.
private SurfaceView previewDisplayView;
// Creates and manages an {@link EGLContext}.
private EglManager eglManager;
// Sends camera-preview frames into a MediaPipe graph for processing, and displays the processed
// frames onto a {@link Surface}.
private FrameProcessor processor;
// Converts the GL_TEXTURE_EXTERNAL_OES texture from Android camera into a regular texture to be
// consumed by {@link FrameProcessor} and the underlying MediaPipe graph.
private ExternalTextureConverter converter;
// Handles camera access via the {@link CameraX} Jetpack support library.
private CameraXPreviewHelper cameraHelper;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
previewDisplayView = new SurfaceView(this);
setupPreviewDisplayView();
// Initilize asset manager so that MediaPipe native libraries can access the app assets, e.g.,
// binary graphs.
AndroidAssetUtil.initializeNativeAssetManager(this);
eglManager = new EglManager(null);
processor =
new FrameProcessor(
this,
eglManager.getNativeContext(),
BINARY_GRAPH_NAME,
INPUT_VIDEO_STREAM_NAME,
OUTPUT_VIDEO_STREAM_NAME);
processor.getVideoSurfaceOutput().setFlipY(FLIP_FRAMES_VERTICALLY);
PermissionHelper.checkAndRequestCameraPermissions(this);
}
@Override
protected void onResume() {
super.onResume();
converter = new ExternalTextureConverter(eglManager.getContext());
converter.setFlipY(FLIP_FRAMES_VERTICALLY);
converter.setConsumer(processor);
if (PermissionHelper.cameraPermissionsGranted(this)) {
startCamera();
}
}
@Override
protected void onPause() {
super.onPause();
converter.close();
}
@Override
public void onRequestPermissionsResult(
int requestCode, String[] permissions, int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
PermissionHelper.onRequestPermissionsResult(requestCode, permissions, grantResults);
}
private void setupPreviewDisplayView() {
previewDisplayView.setVisibility(View.GONE);
ViewGroup viewGroup = findViewById(R.id.preview_display_layout);
viewGroup.addView(previewDisplayView);
previewDisplayView
.getHolder()
.addCallback(
new SurfaceHolder.Callback() {
@Override
public void surfaceCreated(SurfaceHolder holder) {
processor.getVideoSurfaceOutput().setSurface(holder.getSurface());
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// (Re-)Compute the ideal size of the camera-preview display (the area that the
// camera-preview frames get rendered onto, potentially with scaling and rotation)
// based on the size of the SurfaceView that contains the display.
Size viewSize = new Size(width, height);
Size displaySize = cameraHelper.computeDisplaySizeFromViewSize(viewSize);
// Connect the converter to the camera-preview frames as its input (via
// previewFrameTexture), and configure the output width and height as the computed
// display size.
converter.setSurfaceTextureAndAttachToGLContext(
previewFrameTexture, displaySize.getWidth(), displaySize.getHeight());
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
processor.getVideoSurfaceOutput().setSurface(null);
}
});
}
private void startCamera() {
cameraHelper = new CameraXPreviewHelper();
cameraHelper.setOnCameraStartedListener(
surfaceTexture -> {
previewFrameTexture = surfaceTexture;
// Make the display view visible to start showing the preview. This triggers the
// SurfaceHolder.Callback added to (the holder of) previewDisplayView.
previewDisplayView.setVisibility(View.VISIBLE);
});
cameraHelper.startCamera(this, CAMERA_FACING, /*surfaceTexture=*/ null);
}
}

20
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<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
<FrameLayout
android:id="@+id/preview_display_layout"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:layout_weight="1">
<TextView
android:id="@+id/no_camera_access_view"
android:layout_height="fill_parent"
android:layout_width="fill_parent"
android:gravity="center"
android:text="@string/no_camera_access" />
</FrameLayout>
</androidx.constraintlayout.widget.ConstraintLayout>

6
mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/res/values/colors.xml Normal file
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@ -0,0 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<resources>
<color name="colorPrimary">#008577</color>
<color name="colorPrimaryDark">#00574B</color>
<color name="colorAccent">#D81B60</color>
</resources>

4
mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/res/values/strings.xml Normal file
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@ -0,0 +1,4 @@
<resources>
<string name="app_name" translatable="false">Hand Tracking GPU</string>
<string name="no_camera_access" translatable="false">Please grant camera permissions.</string>
</resources>

11
mediapipe/examples/android/src/java/com/google/mediapipe/apps/handtrackinggpu/res/values/styles.xml Normal file
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@ -0,0 +1,11 @@
<resources>
<!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
<!-- Customize your theme here. -->
<item name="colorPrimary">@color/colorPrimary</item>
<item name="colorPrimaryDark">@color/colorPrimaryDark</item>
<item name="colorAccent">@color/colorAccent</item>
</style>
</resources>

21
mediapipe/examples/ios/handdetectiongpu/AppDelegate.h Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property(strong, nonatomic) UIWindow *window;
@end

59
mediapipe/examples/ios/handdetectiongpu/AppDelegate.m Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "AppDelegate.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
return YES;
}
- (void)applicationWillResignActive:(UIApplication *)application {
// Sent when the application is about to move from active to inactive state. This can occur for
// certain types of temporary interruptions (such as an incoming phone call or SMS message) or
// when the user quits the application and it begins the transition to the background state. Use
// this method to pause ongoing tasks, disable timers, and invalidate graphics rendering
// callbacks. Games should use this method to pause the game.
}
- (void)applicationDidEnterBackground:(UIApplication *)application {
// Use this method to release shared resources, save user data, invalidate timers, and store
// enough application state information to restore your application to its current state in case
// it is terminated later. If your application supports background execution, this method is
// called instead of applicationWillTerminate: when the user quits.
}
- (void)applicationWillEnterForeground:(UIApplication *)application {
// Called as part of the transition from the background to the active state; here you can undo
// many of the changes made on entering the background.
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If
// the application was previously in the background, optionally refresh the user interface.
}
- (void)applicationWillTerminate:(UIApplication *)application {
// Called when the application is about to terminate. Save data if appropriate. See also
// applicationDidEnterBackground:.
}
@end

99
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{
"images" : [
{
"idiom" : "iphone",
"size" : "20x20",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "20x20",
"scale" : "3x"
},
{
"idiom" : "iphone",
"size" : "29x29",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "29x29",
"scale" : "3x"
},
{
"idiom" : "iphone",
"size" : "40x40",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "40x40",
"scale" : "3x"
},
{
"idiom" : "iphone",
"size" : "60x60",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "60x60",
"scale" : "3x"
},
{
"idiom" : "ipad",
"size" : "20x20",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "20x20",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "29x29",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "29x29",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "40x40",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "40x40",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "76x76",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "76x76",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "83.5x83.5",
"scale" : "2x"
},
{
"idiom" : "ios-marketing",
"size" : "1024x1024",
"scale" : "1x"
}
],
"info" : {
"version" : 1,
"author" : "xcode"
}
}

7
mediapipe/examples/ios/handdetectiongpu/Assets.xcassets/Contents.json Normal file
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{
"info" : {
"version" : 1,
"author" : "xcode"
}
}

75
mediapipe/examples/ios/handdetectiongpu/BUILD Normal file
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# Copyright 2019 The MediaPipe Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
licenses(["notice"]) # Apache 2.0
MIN_IOS_VERSION = "10.0"
load(
"@build_bazel_rules_apple//apple:ios.bzl",
"ios_application",
)
ios_application(
name = "HandDetectionGpuApp",
bundle_id = "com.google.mediapipe.HandDetectionGpu",
families = [
"iphone",
"ipad",
],
infoplists = ["Info.plist"],
minimum_os_version = MIN_IOS_VERSION,
provisioning_profile = "//mediapipe/examples/ios:provisioning_profile",
deps = [
":HandDetectionGpuAppLibrary",
"@ios_opencv//:OpencvFramework",
],
)
objc_library(
name = "HandDetectionGpuAppLibrary",
srcs = [
"AppDelegate.m",
"ViewController.mm",
"main.m",
],
hdrs = [
"AppDelegate.h",
"ViewController.h",
],
data = [
"Base.lproj/LaunchScreen.storyboard",
"Base.lproj/Main.storyboard",
"//mediapipe/graphs/hand_tracking:hand_detection_mobile_gpu_binary_graph",
"//mediapipe/models:palm_detection.tflite",
"//mediapipe/models:palm_detection_labelmap.txt",
],
sdk_frameworks = [
"AVFoundation",
"CoreGraphics",
"CoreMedia",
"UIKit",
],
deps = [
"//mediapipe/objc:mediapipe_framework_ios",
"//mediapipe/objc:mediapipe_input_sources_ios",
"//mediapipe/objc:mediapipe_layer_renderer",
] + select({
"//mediapipe:ios_i386": [],
"//mediapipe:ios_x86_64": [],
"//conditions:default": [
"//mediapipe/graphs/hand_tracking:detection_mobile_calculators",
],
}),
)

25
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="EHf-IW-A2E">
<objects>
<viewController id="01J-lp-oVM" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="53" y="375"/>
</scene>
</scenes>
</document>

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<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
<device id="retina4_7" orientation="portrait">
<adaptation id="fullscreen"/>
</device>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14490.49"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="EfB-xq-knP">
<rect key="frame" x="0.0" y="20" width="375" height="647"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<accessibility key="accessibilityConfiguration" label="PreviewDisplayView">
<bool key="isElement" value="YES"/>
</accessibility>
</view>
</subviews>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
</view>
<connections>
<outlet property="_liveView" destination="EfB-xq-knP" id="wac-VF-etz"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="48.799999999999997" y="20.239880059970016"/>
</scene>
</scenes>
</document>

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>NSCameraUsageDescription</key>
<string>This app uses the camera to demonstrate live video processing.</string>
<key>CFBundleDevelopmentRegion</key>
<string>en</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>$(PRODUCT_NAME)</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>UILaunchStoryboardName</key>
<string>LaunchScreen</string>
<key>UIMainStoryboardFile</key>
<string>Main</string>
<key>UIRequiredDeviceCapabilities</key>
<array>
<string>armv7</string>
</array>
<key>UISupportedInterfaceOrientations</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
</array>
</dict>
</plist>

19
mediapipe/examples/ios/handdetectiongpu/ViewController.h Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@end

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mediapipe/examples/ios/handdetectiongpu/ViewController.mm Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "ViewController.h"
#import "mediapipe/objc/MPPGraph.h"
#import "mediapipe/objc/MPPCameraInputSource.h"
#import "mediapipe/objc/MPPLayerRenderer.h"
static NSString* const kGraphName = @"hand_detection_mobile_gpu";
static const char* kInputStream = "input_video";
static const char* kOutputStream = "output_video";
static const char* kVideoQueueLabel = "com.google.mediapipe.example.videoQueue";
@interface ViewController () <MPPGraphDelegate, MPPInputSourceDelegate>
// The MediaPipe graph currently in use. Initialized in viewDidLoad, started in viewWillAppear: and
// sent video frames on _videoQueue.
@property(nonatomic) MPPGraph* mediapipeGraph;
@end
@implementation ViewController {
/// Handles camera access via AVCaptureSession library.
MPPCameraInputSource* _cameraSource;
/// Inform the user when camera is unavailable.
IBOutlet UILabel* _noCameraLabel;
/// Display the camera preview frames.
IBOutlet UIView* _liveView;
/// Render frames in a layer.
MPPLayerRenderer* _renderer;
/// Process camera frames on this queue.
dispatch_queue_t _videoQueue;
}
#pragma mark - Cleanup methods
- (void)dealloc {
self.mediapipeGraph.delegate = nil;
[self.mediapipeGraph cancel];
// Ignore errors since we're cleaning up.
[self.mediapipeGraph closeAllInputStreamsWithError:nil];
[self.mediapipeGraph waitUntilDoneWithError:nil];
}
#pragma mark - MediaPipe graph methods
+ (MPPGraph*)loadGraphFromResource:(NSString*)resource {
// Load the graph config resource.
NSError* configLoadError = nil;
NSBundle* bundle = [NSBundle bundleForClass:[self class]];
if (!resource || resource.length == 0) {
return nil;
}
NSURL* graphURL = [bundle URLForResource:resource withExtension:@"binarypb"];
NSData* data = [NSData dataWithContentsOfURL:graphURL options:0 error:&configLoadError];
if (!data) {
NSLog(@"Failed to load MediaPipe graph config: %@", configLoadError);
return nil;
}
// Parse the graph config resource into mediapipe::CalculatorGraphConfig proto object.
mediapipe::CalculatorGraphConfig config;
config.ParseFromArray(data.bytes, data.length);
// Create MediaPipe graph with mediapipe::CalculatorGraphConfig proto object.
MPPGraph* newGraph = [[MPPGraph alloc] initWithGraphConfig:config];
[newGraph addFrameOutputStream:kOutputStream outputPacketType:MediaPipePacketPixelBuffer];
return newGraph;
}
#pragma mark - UIViewController methods
- (void)viewDidLoad {
[super viewDidLoad];
_renderer = [[MPPLayerRenderer alloc] init];
_renderer.layer.frame = _liveView.layer.bounds;
[_liveView.layer addSublayer:_renderer.layer];
_renderer.frameScaleMode = MediaPipeFrameScaleFillAndCrop;
// When using the front camera, mirror the input for a more natural look.
_renderer.mirrored = YES;
dispatch_queue_attr_t qosAttribute = dispatch_queue_attr_make_with_qos_class(
DISPATCH_QUEUE_SERIAL, QOS_CLASS_USER_INTERACTIVE, /*relative_priority=*/0);
_videoQueue = dispatch_queue_create(kVideoQueueLabel, qosAttribute);
_cameraSource = [[MPPCameraInputSource alloc] init];
[_cameraSource setDelegate:self queue:_videoQueue];
_cameraSource.sessionPreset = AVCaptureSessionPresetHigh;
_cameraSource.cameraPosition = AVCaptureDevicePositionFront;
// The frame's native format is rotated with respect to the portrait orientation.
_cameraSource.orientation = AVCaptureVideoOrientationPortrait;
self.mediapipeGraph = [[self class] loadGraphFromResource:kGraphName];
self.mediapipeGraph.delegate = self;
// Set maxFramesInFlight to a small value to avoid memory contention for real-time processing.
self.mediapipeGraph.maxFramesInFlight = 2;
}
// In this application, there is only one ViewController which has no navigation to other view
// controllers, and there is only one View with live display showing the result of running the
// MediaPipe graph on the live video feed. If more view controllers are needed later, the graph
// setup/teardown and camera start/stop logic should be updated appropriately in response to the
// appearance/disappearance of this ViewController, as viewWillAppear: can be invoked multiple times
// depending on the application navigation flow in that case.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[_cameraSource requestCameraAccessWithCompletionHandler:^void(BOOL granted) {
if (granted) {
[self startGraphAndCamera];
dispatch_async(dispatch_get_main_queue(), ^{
_noCameraLabel.hidden = YES;
});
}
}];
}
- (void)startGraphAndCamera {
// Start running self.mediapipeGraph.
NSError* error;
if (![self.mediapipeGraph startWithError:&error]) {
NSLog(@"Failed to start graph: %@", error);
}
// Start fetching frames from the camera.
dispatch_async(_videoQueue, ^{
[_cameraSource start];
});
}
#pragma mark - MPPGraphDelegate methods
// Receives CVPixelBufferRef from the MediaPipe graph. Invoked on a MediaPipe worker thread.
- (void)mediapipeGraph:(MPPGraph*)graph
didOutputPixelBuffer:(CVPixelBufferRef)pixelBuffer
fromStream:(const std::string&)streamName {
if (streamName == kOutputStream) {
// Display the captured image on the screen.
CVPixelBufferRetain(pixelBuffer);
dispatch_async(dispatch_get_main_queue(), ^{
[_renderer renderPixelBuffer:pixelBuffer];
CVPixelBufferRelease(pixelBuffer);
});
}
}
#pragma mark - MPPInputSourceDelegate methods
// Must be invoked on _videoQueue.
- (void)processVideoFrame:(CVPixelBufferRef)imageBuffer
timestamp:(CMTime)timestamp
fromSource:(MPPInputSource*)source {
if (source != _cameraSource) {
NSLog(@"Unknown source: %@", source);
return;
}
[self.mediapipeGraph sendPixelBuffer:imageBuffer
intoStream:kInputStream
packetType:MediaPipePacketPixelBuffer];
}
@end

22
mediapipe/examples/ios/handdetectiongpu/main.m Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
int main(int argc, char * argv[]) {
@autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}

21
mediapipe/examples/ios/handtrackinggpu/AppDelegate.h Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property(strong, nonatomic) UIWindow *window;
@end

59
mediapipe/examples/ios/handtrackinggpu/AppDelegate.m Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "AppDelegate.h"
@interface AppDelegate ()
@end
@implementation AppDelegate
- (BOOL)application:(UIApplication *)application
didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
// Override point for customization after application launch.
return YES;
}
- (void)applicationWillResignActive:(UIApplication *)application {
// Sent when the application is about to move from active to inactive state. This can occur for
// certain types of temporary interruptions (such as an incoming phone call or SMS message) or
// when the user quits the application and it begins the transition to the background state. Use
// this method to pause ongoing tasks, disable timers, and invalidate graphics rendering
// callbacks. Games should use this method to pause the game.
}
- (void)applicationDidEnterBackground:(UIApplication *)application {
// Use this method to release shared resources, save user data, invalidate timers, and store
// enough application state information to restore your application to its current state in case
// it is terminated later. If your application supports background execution, this method is
// called instead of applicationWillTerminate: when the user quits.
}
- (void)applicationWillEnterForeground:(UIApplication *)application {
// Called as part of the transition from the background to the active state; here you can undo
// many of the changes made on entering the background.
}
- (void)applicationDidBecomeActive:(UIApplication *)application {
// Restart any tasks that were paused (or not yet started) while the application was inactive. If
// the application was previously in the background, optionally refresh the user interface.
}
- (void)applicationWillTerminate:(UIApplication *)application {
// Called when the application is about to terminate. Save data if appropriate. See also
// applicationDidEnterBackground:.
}
@end

99
mediapipe/examples/ios/handtrackinggpu/Assets.xcassets/AppIcon.appiconset/Contents.json Normal file
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{
"images" : [
{
"idiom" : "iphone",
"size" : "20x20",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "20x20",
"scale" : "3x"
},
{
"idiom" : "iphone",
"size" : "29x29",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "29x29",
"scale" : "3x"
},
{
"idiom" : "iphone",
"size" : "40x40",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "40x40",
"scale" : "3x"
},
{
"idiom" : "iphone",
"size" : "60x60",
"scale" : "2x"
},
{
"idiom" : "iphone",
"size" : "60x60",
"scale" : "3x"
},
{
"idiom" : "ipad",
"size" : "20x20",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "20x20",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "29x29",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "29x29",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "40x40",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "40x40",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "76x76",
"scale" : "1x"
},
{
"idiom" : "ipad",
"size" : "76x76",
"scale" : "2x"
},
{
"idiom" : "ipad",
"size" : "83.5x83.5",
"scale" : "2x"
},
{
"idiom" : "ios-marketing",
"size" : "1024x1024",
"scale" : "1x"
}
],
"info" : {
"version" : 1,
"author" : "xcode"
}
}

7
mediapipe/examples/ios/handtrackinggpu/Assets.xcassets/Contents.json Normal file
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{
"info" : {
"version" : 1,
"author" : "xcode"
}
}

95
mediapipe/examples/ios/handtrackinggpu/BUILD Normal file
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# Copyright 2019 The MediaPipe Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
licenses(["notice"]) # Apache 2.0
MIN_IOS_VERSION = "10.0"
load(
"@build_bazel_rules_apple//apple:ios.bzl",
"ios_application",
)
# To use the 3D model instead of the default 2D model, add "--define 3D=true" to the
# bazel build command.
config_setting(
name = "use_3d_model",
define_values = {
"3D": "true",
},
)
genrule(
name = "model",
srcs = select({
"//conditions:default": ["//mediapipe/models:hand_landmark.tflite"],
":use_3d_model": ["//mediapipe/models:hand_landmark_3d.tflite"],
}),
outs = ["hand_landmark.tflite"],
cmd = "cp $< $@",
)
ios_application(
name = "HandTrackingGpuApp",
bundle_id = "com.google.mediapipe.HandTrackingGpu",
families = [
"iphone",
"ipad",
],
infoplists = ["Info.plist"],
minimum_os_version = MIN_IOS_VERSION,
provisioning_profile = "//mediapipe/examples/ios:provisioning_profile",
deps = [
":HandTrackingGpuAppLibrary",
"@ios_opencv//:OpencvFramework",
],
)
objc_library(
name = "HandTrackingGpuAppLibrary",
srcs = [
"AppDelegate.m",
"ViewController.mm",
"main.m",
],
hdrs = [
"AppDelegate.h",
"ViewController.h",
],
data = [
"Base.lproj/LaunchScreen.storyboard",
"Base.lproj/Main.storyboard",
":model",
"//mediapipe/graphs/hand_tracking:hand_tracking_mobile_gpu_binary_graph",
"//mediapipe/models:palm_detection.tflite",
"//mediapipe/models:palm_detection_labelmap.txt",
],
sdk_frameworks = [
"AVFoundation",
"CoreGraphics",
"CoreMedia",
"UIKit",
],
deps = [
"//mediapipe/objc:mediapipe_framework_ios",
"//mediapipe/objc:mediapipe_input_sources_ios",
"//mediapipe/objc:mediapipe_layer_renderer",
] + select({
"//mediapipe:ios_i386": [],
"//mediapipe:ios_x86_64": [],
"//conditions:default": [
"//mediapipe/graphs/hand_tracking:mobile_calculators",
],
}),
)

25
mediapipe/examples/ios/handtrackinggpu/Base.lproj/LaunchScreen.storyboard Normal file
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="13122.16" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="13104.12"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="EHf-IW-A2E">
<objects>
<viewController id="01J-lp-oVM" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="53" y="375"/>
</scene>
</scenes>
</document>

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<?xml version="1.0" encoding="UTF-8"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="14490.70" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES" initialViewController="BYZ-38-t0r">
<device id="retina4_7" orientation="portrait">
<adaptation id="fullscreen"/>
</device>
<dependencies>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="14490.49"/>
<capability name="Safe area layout guides" minToolsVersion="9.0"/>
<capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="ViewController" sceneMemberID="viewController">
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="375" height="667"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<view contentMode="scaleToFill" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="EfB-xq-knP">
<rect key="frame" x="0.0" y="20" width="375" height="647"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" white="0.0" alpha="1" colorSpace="custom" customColorSpace="genericGamma22GrayColorSpace"/>
<accessibility key="accessibilityConfiguration" label="PreviewDisplayView">
<bool key="isElement" value="YES"/>
</accessibility>
</view>
</subviews>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<viewLayoutGuide key="safeArea" id="6Tk-OE-BBY"/>
</view>
<connections>
<outlet property="_liveView" destination="EfB-xq-knP" id="wac-VF-etz"/>
</connections>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="48.799999999999997" y="20.239880059970016"/>
</scene>
</scenes>
</document>

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mediapipe/examples/ios/handtrackinggpu/Info.plist Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>NSCameraUsageDescription</key>
<string>This app uses the camera to demonstrate live video processing.</string>
<key>CFBundleDevelopmentRegion</key>
<string>en</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>$(PRODUCT_NAME)</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>1.0</string>
<key>CFBundleVersion</key>
<string>1</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>UILaunchStoryboardName</key>
<string>LaunchScreen</string>
<key>UIMainStoryboardFile</key>
<string>Main</string>
<key>UIRequiredDeviceCapabilities</key>
<array>
<string>armv7</string>
</array>
<key>UISupportedInterfaceOrientations</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
</array>
</dict>
</plist>

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mediapipe/examples/ios/handtrackinggpu/ViewController.h Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@end

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mediapipe/examples/ios/handtrackinggpu/ViewController.mm Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import "ViewController.h"
#import "mediapipe/objc/MPPGraph.h"
#import "mediapipe/objc/MPPCameraInputSource.h"
#import "mediapipe/objc/MPPLayerRenderer.h"
static NSString* const kGraphName = @"hand_tracking_mobile_gpu";
static const char* kInputStream = "input_video";
static const char* kOutputStream = "output_video";
static const char* kVideoQueueLabel = "com.google.mediapipe.example.videoQueue";
@interface ViewController () <MPPGraphDelegate, MPPInputSourceDelegate>
// The MediaPipe graph currently in use. Initialized in viewDidLoad, started in viewWillAppear: and
// sent video frames on _videoQueue.
@property(nonatomic) MPPGraph* mediapipeGraph;
@end
@implementation ViewController {
/// Handles camera access via AVCaptureSession library.
MPPCameraInputSource* _cameraSource;
/// Inform the user when camera is unavailable.
IBOutlet UILabel* _noCameraLabel;
/// Display the camera preview frames.
IBOutlet UIView* _liveView;
/// Render frames in a layer.
MPPLayerRenderer* _renderer;
/// Process camera frames on this queue.
dispatch_queue_t _videoQueue;
}
#pragma mark - Cleanup methods
- (void)dealloc {
self.mediapipeGraph.delegate = nil;
[self.mediapipeGraph cancel];
// Ignore errors since we're cleaning up.
[self.mediapipeGraph closeAllInputStreamsWithError:nil];
[self.mediapipeGraph waitUntilDoneWithError:nil];
}
#pragma mark - MediaPipe graph methods
+ (MPPGraph*)loadGraphFromResource:(NSString*)resource {
// Load the graph config resource.
NSError* configLoadError = nil;
NSBundle* bundle = [NSBundle bundleForClass:[self class]];
if (!resource || resource.length == 0) {
return nil;
}
NSURL* graphURL = [bundle URLForResource:resource withExtension:@"binarypb"];
NSData* data = [NSData dataWithContentsOfURL:graphURL options:0 error:&configLoadError];
if (!data) {
NSLog(@"Failed to load MediaPipe graph config: %@", configLoadError);
return nil;
}
// Parse the graph config resource into mediapipe::CalculatorGraphConfig proto object.
mediapipe::CalculatorGraphConfig config;
config.ParseFromArray(data.bytes, data.length);
// Create MediaPipe graph with mediapipe::CalculatorGraphConfig proto object.
MPPGraph* newGraph = [[MPPGraph alloc] initWithGraphConfig:config];
[newGraph addFrameOutputStream:kOutputStream outputPacketType:MediaPipePacketPixelBuffer];
return newGraph;
}
#pragma mark - UIViewController methods
- (void)viewDidLoad {
[super viewDidLoad];
_renderer = [[MPPLayerRenderer alloc] init];
_renderer.layer.frame = _liveView.layer.bounds;
[_liveView.layer addSublayer:_renderer.layer];
_renderer.frameScaleMode = MediaPipeFrameScaleFillAndCrop;
// When using the front camera, mirror the input for a more natural look.
_renderer.mirrored = YES;
dispatch_queue_attr_t qosAttribute = dispatch_queue_attr_make_with_qos_class(
DISPATCH_QUEUE_SERIAL, QOS_CLASS_USER_INTERACTIVE, /*relative_priority=*/0);
_videoQueue = dispatch_queue_create(kVideoQueueLabel, qosAttribute);
_cameraSource = [[MPPCameraInputSource alloc] init];
[_cameraSource setDelegate:self queue:_videoQueue];
_cameraSource.sessionPreset = AVCaptureSessionPresetHigh;
_cameraSource.cameraPosition = AVCaptureDevicePositionFront;
// The frame's native format is rotated with respect to the portrait orientation.
_cameraSource.orientation = AVCaptureVideoOrientationPortrait;
self.mediapipeGraph = [[self class] loadGraphFromResource:kGraphName];
self.mediapipeGraph.delegate = self;
// Set maxFramesInFlight to a small value to avoid memory contention for real-time processing.
self.mediapipeGraph.maxFramesInFlight = 2;
}
// In this application, there is only one ViewController which has no navigation to other view
// controllers, and there is only one View with live display showing the result of running the
// MediaPipe graph on the live video feed. If more view controllers are needed later, the graph
// setup/teardown and camera start/stop logic should be updated appropriately in response to the
// appearance/disappearance of this ViewController, as viewWillAppear: can be invoked multiple times
// depending on the application navigation flow in that case.
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[_cameraSource requestCameraAccessWithCompletionHandler:^void(BOOL granted) {
if (granted) {
[self startGraphAndCamera];
dispatch_async(dispatch_get_main_queue(), ^{
_noCameraLabel.hidden = YES;
});
}
}];
}
- (void)startGraphAndCamera {
// Start running self.mediapipeGraph.
NSError* error;
if (![self.mediapipeGraph startWithError:&error]) {
NSLog(@"Failed to start graph: %@", error);
}
// Start fetching frames from the camera.
dispatch_async(_videoQueue, ^{
[_cameraSource start];
});
}
#pragma mark - MPPGraphDelegate methods
// Receives CVPixelBufferRef from the MediaPipe graph. Invoked on a MediaPipe worker thread.
- (void)mediapipeGraph:(MPPGraph*)graph
didOutputPixelBuffer:(CVPixelBufferRef)pixelBuffer
fromStream:(const std::string&)streamName {
if (streamName == kOutputStream) {
// Display the captured image on the screen.
CVPixelBufferRetain(pixelBuffer);
dispatch_async(dispatch_get_main_queue(), ^{
[_renderer renderPixelBuffer:pixelBuffer];
CVPixelBufferRelease(pixelBuffer);
});
}
}
#pragma mark - MPPInputSourceDelegate methods
// Must be invoked on _videoQueue.
- (void)processVideoFrame:(CVPixelBufferRef)imageBuffer
timestamp:(CMTime)timestamp
fromSource:(MPPInputSource*)source {
if (source != _cameraSource) {
NSLog(@"Unknown source: %@", source);
return;
}
[self.mediapipeGraph sendPixelBuffer:imageBuffer
intoStream:kInputStream
packetType:MediaPipePacketPixelBuffer];
}
@end

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mediapipe/examples/ios/handtrackinggpu/main.m Normal file
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// Copyright 2019 The MediaPipe Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#import <UIKit/UIKit.h>
#import "AppDelegate.h"
int main(int argc, char * argv[]) {
@autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
}
}

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mediapipe/models/palm_detection_labelmap.txt Normal file
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Palm