An algorithm of lips secondary positioning and feature extraction based on YCbCr color space

In recent years, face recognition is becoming one of the hot spots in the field of human-computer interaction. As the main organ, lips are one of the important features of face recognition. In order to get the features of lips, the paper positions the lips and segments it. The paper simulates the process by the MATLAB and gains the features of lips. Compared to the traditional algorithm of RGB color space, it has the advantages of fast calculation and high accuracy rate. It also gains the good effect in the light of different level.