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Added MPPDetectionHelpers

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This commit is contained in:
Prianka Liz Kariat 2023-04-03 20:11:44 +05:30
parent 9421249de1
commit 4943029d62
3 changed files with 119 additions and 0 deletions
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11
mediapipe/tasks/ios/components/containers/utils/BUILD
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@ -61,3 +61,14 @@ objc_library(
"//mediapipe/tasks/ios/components/containers:MPPEmbeddingResult",
],
)
objc_library(
name = "MPPDetectionHelpers",
srcs = ["sources/MPPDetection+Helpers.mm"],
hdrs = ["sources/MPPDetection+Helpers.h"],
deps = [
"//mediapipe/framework/formats:detection_cc_proto",
"//mediapipe/tasks/ios/common/utils:NSStringHelpers",
"//mediapipe/tasks/ios/components/containers:MPPDetection",
],
)

26
mediapipe/tasks/ios/components/containers/utils/sources/MPPDetection+Helpers.h Normal file
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@ -0,0 +1,26 @@
// Copyright 2023 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.
#include "mediapipe/framework/formats/detection.pb.h"
#import "mediapipe/tasks/ios/components/containers/sources/MPPDetection.h"
NS_ASSUME_NONNULL_BEGIN
@interface MPPDetection (Helpers)
+ (MPPDetection *)detectionWithProto:(const mediapipe::Detection &)detectionProto;
@end
NS_ASSUME_NONNULL_END

82
mediapipe/tasks/ios/components/containers/utils/sources/MPPDetection+Helpers.mm Normal file
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@ -0,0 +1,82 @@
// Copyright 2023 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 "mediapipe/tasks/ios/components/containers/utils/sources/MPPDetection+Helpers.h"
#import "mediapipe/tasks/ios/common/utils/sources/NSString+Helpers.h"
static const NSInteger kDefaultCategoryIndex = -1;
namespace {
using DetectionProto = ::mediapipe::Detection;
using BoundingBoxProto = ::mediapipe::LocationData::BoundingBox;
} // namespace
@implementation MPPDetection (Helpers)
+ (MPPDetection *)detectionWithProto:(const DetectionProto &)detectionProto {
NSMutableArray<MPPCategory *> *categories =
[NSMutableArray arrayWithCapacity:(NSUInteger)detectionProto.score_size()];
for (int idx = 0; idx < detectionProto.score_size(); ++idx) {
NSInteger categoryIndex =
detectionProto.label_id_size() > idx ? detectionProto.label_id(idx) : kDefaultCategoryIndex;
NSString *categoryName = detectionProto.label_size() > idx
? [NSString stringWithCppString:detectionProto.label(idx)]
: nil;
NSString *displayName = detectionProto.display_name_size() > idx
? [NSString stringWithCppString:detectionProto.display_name(idx)]
: nil;
[categories addObject:[[MPPCategory alloc] initWithIndex:categoryIndex
score:detectionProto.score(idx)
categoryName:categoryName
displayName:displayName]];
}
CGRect boundingBox = CGRectZero;
if (detectionProto.location_data().has_bounding_box()) {
const BoundingBoxProto &boundingBoxProto = detectionProto.location_data().bounding_box();
boundingBox.origin.x = boundingBoxProto.xmin();
boundingBox.origin.y = boundingBoxProto.ymin();
boundingBox.size.width = boundingBoxProto.width();
boundingBox.size.height = boundingBoxProto.height();
}
NSMutableArray<MPPNormalizedKeypoint *> *normalizedKeypoints;
if (!detectionProto.location_data().relative_keypoints().empty()) {
normalizedKeypoints = [NSMutableArray
arrayWithCapacity:(NSUInteger)detectionProto.location_data().relative_keypoints_size()];
for (const auto &keypoint : detectionProto.location_data().relative_keypoints()) {
NSString *label = keypoint.has_keypoint_label()
? [NSString stringWithCppString:keypoint.keypoint_label()]
: nil;
CGPoint location = CGPointMake(keypoint.x(), keypoint.y());
float score = keypoint.has_score() ? keypoint.score() : 0.0f;
[normalizedKeypoints addObject:[[MPPNormalizedKeypoint alloc] initWithLocation:location
label:label
score:score]];
}
}
return [[MPPDetection alloc] initWithCategories:categories
boundingBox:boundingBox
keypoints:normalizedKeypoints];
}
@end