关键词: 投影算法, 动态阈值, 边缘检测, 提取

Abstract: A lip detection method is put forward, according to the difference properties between face color and lip color in R, G, B chromaticity component on the distribution between the yellow race and the white race. This method identifies the threshold by the chromaticity difference, and segments the lip rectangular area by using projection algorithm, then extracts the lip combined with the edge detection and dynamic threshold method. Compared with the Red Exclusion algorithm, the results show that, the algorithm is simple, quick, and the accuracy of this detection algorithm is improved and advanced such as different shades of color, uneven illumination and a certain degree of angular deflection of the head etc.

Key words: projection algorithm, dynamic threshold, edge detection, extraction