Yu Huang Guangyou Xu Yuanxin Zhu Extraction of Spatial-Temporal Features for Vision-Based Gesture Recognition. 64-72 2000 15 J. Comput. Sci. Technol. 1 http://jcst.ict.ac.cn/cone/cone01.html#paper7 db/journals/jcst/jcst15.html#YuXY00