“…Over the last few years, various 3D skeleton-based models have been developed for gesture recognition, ranging from feature representations [44,45,35,7,3,1,48,27,26,8] to various forms of parametric approaches [36,37,32,28,22,29,14,15,41,38,46]; and also including many deep learning methods [43,42,25,10,4,49,23,17,19,30,20,13]. Despite the encouraging progress having been made by various studies, accurately recognizing human gestures is still challenging.…”