Mammogram Enhancement Using Wavelet Transform and Sigmoid Function

Abstract:

Mammogram enhancement is important for the radiologist to diagnose and screen breast cancer. This paper proposes a method to improve contrast and denoising in mammogram using wavelet transform and sigmoid function. First, mammogram is decomposed using wavelet transform and detail coefficients are decreased in order to remove noises by soft thresholding. Inverse wavelet transform is then applied to obtain the denoised image. Finally, sigmoid function is applied to the image to enhance mammogram. Experimental results illustrate that the proposed method can improve contrast and denoise mammogram effectively.

• Periodical: Applied Mechanics and Materials (Volume 781)
• Pages: 632-636
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.781.632
• Online since: August 2015
• Authors: Varakorn Kidsumran, Werapon Chiracharit
• Keywords: Mammogram Enhancement, Sigmoid Function, Wavelet Transform (WT)

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