Tsallis Entropy Based Contrast Enhancement of Microcalcifications

Abstract

This paper presents a new approach to enhance thecontrast of microcalcifications in mammograms using afuzzy algorithm based on Tsallis entropy. In phase I imageis fuzzified using S membership function. In Phase II usingthe non-uniformity factor calculated from local informationthe contrast of Microcalcifications were enhanced whilesuppressing the background heavily. This is the first time inliterature to propose an enhancement algorithm usingTsallis entropy. Tsallis entropy has an extra parameter q.We assume that grade of mammogram is related with qparameter. The values of q were calculated from thehistogram. The proposed approach can be even suitable fordense mammograms.