实现人体步态检测和基于步态的人体身份识别算法，主要内容包括背景的提取，人体运动区域检测，人体轮廓提取，步态特征的提取，相似性度量和分类识别。-Detection and realize human gait gait-based human identification algorithm, the main contents include background extraction, human motion region detection, the body contour extrac