One facial detection system can judge a person's "happiness" or "fear" level.

一种面部检测系统可对人的“快乐”或“恐惧”程度作出判断。

This paper examines the research situation on face image detection and recognition and designs a facial feature automatic extract system.

对人脸图像检测与识别技术的研究现状进行简要论述，并自行设计一个人脸特征自动提取系统。

A facial expression recognition system contains face detection, face feature extraction, feature selection and expression classification.

表情识别系统包括人脸检测、人脸特征提取、特征选择以及表情分类等几部分。