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 of the realization of human gait and gait-based human identification algorithms, including the background of the main contents of the extraction, detection of human motio