A keypoint is one labelled coordinate the model locates, such as a wrist or an eye corner. Collections of keypoints form skeletons and face meshes; their movement over frames is what fitness counters and AR effects read.
The book · Volume 6 of 7
AI for Video: A Complete Guide to Intelligence in Video Products: From Models and Inference to Computer Vision, Speech, Search, and Generative Video
Keypoint accuracy decides whether a fitness counter counts reps correctly or an AR effect sticks to a face. This volume covers keypoint models in its computer vision section: pose estimation with MediaPipe, RTMPose and ViTPose, face landmarks, tracking keypoints over time, and on-device deployment. Written by Nikolay Sapunov, CEO at Fora Soft.
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