We propose an algorithm for facial expression recognition which can classify the given image into one of the seven basic facial expression categories (happiness, sadness, fear, surprise, anger, disgust and neutral). PCA is used for dimensionality red

matlab人脸识别,能精准识别照片中的人脸，并且精确识别出人脸五官，给出照片库，能进行对比从而找出人脸。(Matlab face recognition, can accurately identify the face in the photo, and accurately identify the facial features, give a photo library, can be compared to find out the face.)