基于MediaPipe 实现姿态检测

# pose_landmark Subgraphs|Details :--- | :--- [`PoseLandmarkByRoiCpu`](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_by_roi_cpu.pbtxt)| Detects landmarks of a single body pose. See landmarks (aka keypoints) [scheme](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_topology.svg). (CPU input, and inference is executed on CPU.) [`PoseLandmarkByRoiGpu`](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_by_roi_gpu.pbtxt)| Detects landmarks of a single body pose. See landmarks (aka keypoints) [scheme](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_topology.svg). (GPU input, and inference is executed on GPU) [`PoseLandmarkCpu`](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_cpu.pbtxt)| Detects landmarks of a single body pose. See landmarks (aka keypoints) [scheme](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_topology.svg). (CPU input, and inference is executed on CPU) [`PoseLandmarkGpu`](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_gpu.pbtxt)| Detects landmarks of a single body pose. See landmarks (aka keypoints) [scheme](https://github.com/google/mediapipe/tree/master/mediapipe/modules/pose_landmark/pose_landmark_topology.svg). (GPU input, and inference is executed on GPU.)