Automatic Extraction of Tongue Coatings from Digital Images:A Traditional Chinese Medicine Diagnostic Tool

In traditional Chinese medicine,the coating on the tongue is considered to be a reflection of various pathologic factors.However,the conventional method to examine the tongue lacks an acceptable standard and does not provide the means for sharing information.This paper describes a segmentation method to extract tongue coatings.First,the tongue body was extracted from the original image using the watershed transform.Then,a threshold method was applied to the image to eliminate the light from the camera fl...