说明：  matlab的手势识别，手部提取经过了肤色的提取，高斯滤波，锐化处理，以及HU矩运算，可以进行单独的手势识别，只要实现做好手势模板即可
(matlab gesture recognition, hand extracted through the skin color extraction, Gaussian filtering, sharpening, and HU moments computing, gesture recognition can be separate, as long as you can achieve good gesture template)