106 lines
3.9 KiB
C++
106 lines
3.9 KiB
C++
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "mediapipe/framework/formats/image_frame_opencv.h"
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#include "mediapipe/framework/formats/image_format.pb.h"
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#include "mediapipe/framework/formats/image_frame.h"
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#include "mediapipe/framework/port/gtest.h"
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#include "mediapipe/framework/port/integral_types.h"
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#include "mediapipe/framework/port/logging.h"
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namespace mediapipe {
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namespace {
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// Set image_frame to a constant per-channel pix_value.
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template <class T>
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void SetToColor(const T* pix_value, ImageFrame* image_frame) {
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const int cols = image_frame->Width();
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const int rows = image_frame->Height();
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const int channels = image_frame->NumberOfChannels();
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const int width_padding =
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image_frame->WidthStep() / (sizeof(T)) - cols * channels;
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T* pixel = reinterpret_cast<T*>(image_frame->MutablePixelData());
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for (int row = 0; row < rows; ++row) {
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for (int col = 0; col < cols; ++col) {
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for (int channel = 0; channel < channels; ++channel) {
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pixel[channel] = pix_value[channel];
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}
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pixel += channels;
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}
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pixel += width_padding;
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}
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}
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TEST(ImageFrameOpencvTest, ConvertToMat) {
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const int i_width = 123, i_height = 45;
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ImageFrame frame1(ImageFormat::GRAY8, i_width, i_height);
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ImageFrame frame2(ImageFormat::GRAY8, i_width, i_height);
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// Check adding constant images.
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const uint8 frame1_val = 12;
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const uint8 frame2_val = 34;
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SetToColor<uint8>(&frame1_val, &frame1);
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SetToColor<uint8>(&frame2_val, &frame2);
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// Get Mat wrapper around ImageFrame memory (zero copy).
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cv::Mat frame1_mat = formats::MatView(&frame1);
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cv::Mat frame2_mat = formats::MatView(&frame2);
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// Use OpenCV functions directly on ImageFrame data.
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cv::Mat frame_sum = frame1_mat + frame2_mat;
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const auto frame_avg = static_cast<int>(cv::mean(frame_sum)[0]);
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EXPECT_EQ(frame_avg, frame1_val + frame2_val);
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// Check setting min/max pixels.
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uint8* frame1_ptr = frame1.MutablePixelData();
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frame1_ptr[(i_width - 5) + (i_height - 5) * frame1.WidthStep()] = 1;
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frame1_ptr[(i_width - 6) + (i_height - 6) * frame1.WidthStep()] = 100;
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double min, max;
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cv::Point min_loc, max_loc;
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cv::minMaxLoc(frame1_mat, &min, &max, &min_loc, &max_loc);
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EXPECT_EQ(min, 1);
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EXPECT_EQ(min_loc.x, i_width - 5);
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EXPECT_EQ(min_loc.y, i_height - 5);
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EXPECT_EQ(max, 100);
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EXPECT_EQ(max_loc.x, i_width - 6);
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EXPECT_EQ(max_loc.y, i_height - 6);
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}
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TEST(ImageFrameOpencvTest, ImageFormats) {
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const int i_width = 123, i_height = 45;
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ImageFrame frame_g8(ImageFormat::GRAY8, i_width, i_height);
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ImageFrame frame_g16(ImageFormat::GRAY16, i_width, i_height);
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ImageFrame frame_v32f1(ImageFormat::VEC32F1, i_width, i_height);
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ImageFrame frame_v32f2(ImageFormat::VEC32F2, i_width, i_height);
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ImageFrame frame_c3(ImageFormat::SRGB, i_width, i_height);
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ImageFrame frame_c4(ImageFormat::SRGBA, i_width, i_height);
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cv::Mat mat_g8 = formats::MatView(&frame_g8);
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cv::Mat mat_g16 = formats::MatView(&frame_g16);
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cv::Mat mat_v32f1 = formats::MatView(&frame_v32f1);
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cv::Mat mat_v32f2 = formats::MatView(&frame_v32f2);
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cv::Mat mat_c3 = formats::MatView(&frame_c3);
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cv::Mat mat_c4 = formats::MatView(&frame_c4);
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EXPECT_EQ(mat_g8.type(), CV_8UC1);
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EXPECT_EQ(mat_g16.type(), CV_16UC1);
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EXPECT_EQ(mat_v32f1.type(), CV_32FC1);
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EXPECT_EQ(mat_v32f2.type(), CV_32FC2);
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EXPECT_EQ(mat_c3.type(), CV_8UC3);
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EXPECT_EQ(mat_c4.type(), CV_8UC4);
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}
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} // namespace
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} // namespace mediapipe
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