人的容貌或脸面具有丰富的特征。用脸部特征认人是人们的常识行为。经验告诉我们，脸部特征是区别众多对象的有效图形。这些特征综合在一起还具有传神、传情、传意，反映喜、怒、哀、乐的深层次整体效果。人们喜欢按脸面、容貌去识别人，分析人，判断人。由此，统计学家设计了 Human face or face is rich in features. Identifying people with facial features is a commonsense behavior of people. Experience tells us that facial features are effective graphics that distinguish many objects. Together with these characteristics, they also have the profound overall effect of expressing emotions, telling emotions and expressing joy, anger, sadness and happiness. People like to recognize people, analyze people, and judge people by face and appearance. As a result, statisticians designed