Both lists are related to grouping keypoints into person instances. Network predicts two tensors: the first with keypoint heatmaps, to localize all possible keypoints of each type (neck, left shoulder, right shoulder, left elbow, etc.) and the second with connections between keypoints of predefined type.

heatmaps是关键点的热图共19张，表示特定的某个关节在某个位置上的算是置信度。