我认为OpenCV中唯一支持手势识别的支持正是Luca Del Tongo在您链接的视频中展示的，即

I think the only support in OpenCV for hand gesture recognition is exactly what Luca Del Tongo demonstrated in the video you linked to, namely cvConvexityDefects().

您可能希望使用颜色空间过滤(如视频中建议的那样)并使用ML分类器来检测实际手势来提取手罩.尽管目前尚未在OpenCV中按原样实现 ，但已有几篇论文完成了此操作.

You might want to extract the hand mask using color-space filtering (as suggested in the video), and using ML classifiers for detecting the actual gesture. There have been several papers that have done this, though this is not currently implemented as-such in OpenCV.