Enhancement of the Contrast in Mammographic Images Using the Homomorphic Filter Method

Jeong Hyun YOON  Yong Man RO  

IEICE TRANSACTIONS on Information and Systems   Vol.E85-D   No.1   pp.298-303
Publication Date: 2002/01/01
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Medical Engineering
breast cancer,  mammography,  homomorphic filter,  contrast enhancement,  wavelet transform,  

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The use of the homomorphic filter technique is described in order to enhance the contrast in the mammographic images, which is adopted to the dyadic wavelet transform. The proposed method has employed the nonlinear enhancement in homomorphic filtering as well as denoising method in the wavelet domains. Experimental results show that the homomorphic filtering method improves the contrast in breast tumor images such that the contrast improvement index is increased by two fold compared to the conventional wavelet-based enhancement technique.