“…As a cornerstone of computer vision, 2D HPE drives the prosperity and development of action recognition [1], pedestrian tracking [2], gesture recognition [3], gait recognition [4] and other related fields [5], [6]. Meanwhile, real-time 2D HPE extends its influence to daily activity scenarios, including intelligent video surveillance [7], patient monitoring systems [8], virtual reality [9], autonomous drive [10], human animation [11], smart home [12], [13], athlete-assisted training [14], etc.…”