Fig. 9From: Lip segmentation using automatic selected initial contours based on localized active contour model1–3 a From left to right: RGB images after illumination equalization, outer initial contours, inner initial contours, results of outer boundary, results of inner boundary, final segmentation results; b Convergence results of outer and inner initial contour in U, C2 and C3 components; c Segmentation results of images in bBack to article page