A Local Contrast Enhancement Method for Mammograms in the Curvelet Domain
نویسندگان
چکیده
In this paper, a method aimed at optimizing contrast of mammographic features is presented. Contrast enhancement is accomplished by applying local range modification on curvelet coefficients. The standard deviation of coefficient values for each scale/angle pair (j,l) is calculated as an index to increase the gain of subband curvelet coefficients. The processed image is derived by reconstruction from the modified curvelet coefficients. The edge protection index and the contrast improvement index are used to evaluate the quality of proceeded image regions containing verified lesions. Results of the experiment show the efficiency of the method.
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