Segmentation of tongue image using color edge detector and boundary tracing technique

In-this paper, a segmentation algorithm for tongue images based on the color edge detector and the boundary tracing technique is presented. The color edge detector is obtained after reconstructing the grayscale Sobel operator. It is based on the color difference and can detect the edges of color images in parallel. After edges of tongue images are extracted, the tongue boundary line can be detected using the inner boundary tracing technique. Experimental results show the effectiveness of the segmentation algorithm.