Breast cancer has emerged as a health problem is today's world. There are many reasons for the occurrence of breast cancer. Early detection of the breast cancer is important for the proper treatment at the right time. There are many techniques to detect the breast cancer. But the best known is the mammography. Mammography is a low beam x-ray, so for the detection of the cancerous masses contrast enhancement is must in mammography. In this paper we are discussing some of the contrast enhancement techniques used in the mammograms.
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