人脸检测方法主要有基于知识的方法、特征不变方法、模板匹配方法、基于外观的方法；脸部特征定位方法分为基于先验知识、几何形状、色彩、外观和关联信息等五类；人脸表情识别方法分为基于几何特征的识别方法，基于整体的识别方法，基于模型的识别方法，基于模板的识别方法。-Face detection methods are mainly based on knowledge of the method, the characteristics of constant method, template matching method, the method based on appearance　Facial features localization method based on prior knowledge, geometric shape, color, appearance and associated information and so on five categories　Facial expression recognition method, divided into recognition method based on the geometric features and recognition method based on the whole, the recognition method based on the model, the identification method based on template.