The face detection and tracking is the key technology in the field of face information processing,it widely applied in the fields of automated face recognition system,content based image retrieval, video monitoring,shortcut detection and human-machine alternative technology. Firstly,detect the skin area of one image with the statistics theory, next, convert these area into compress domain through discrete Walsh transform, lastly,propose the new eight directions chain code template and angle template to judge whether the face region or not. The experimental results show the superiority of the proposed algorithm in terms of human face retrieval precision and speed, it also very suitable for face detection system that requires the timeliness highly.%人脸的检测是人脸信息处理领域中的一项关键技术,在自动人脸识别系统、基于内容的图像检索、视觉监测、场景检测、新一代人机交互技术等领域具有广阔的应用前景.通过在压缩域利用DC系数重构图像,提出了改进的链码模板和通过训练产生角度模板来对候选区域进行搜索匹配和检测.实验结果显示,本方法在检测人脸的过程中速度快,漏检率较低,非常适合实时性要求高的人脸检测系统.
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