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http://dx.doi.org/10.7472/jksii.2012.13.3.61

Maximum-Entropy Image Enhancement Using Brightness Mean and Variance  

Yoo, Ji-Hyun (서울여자대학교 대학원 컴퓨터학과)
Ohm, Seong-Yong (서울여자대학교 멀티미디어학과)
Chung, Min-Gyo (서울여자대학교 멀티미디어학과)
Publication Information
Journal of Internet Computing and Services / v.13, no.3, 2012 , pp. 61-73 More about this Journal
Abstract
This paper proposes a histogram specification based image enhancement method, which uses the brightness mean and variance of an image to maximize the entropy of the image. In our histogram specification step, the Gaussian distribution is used to fit the input histogram as well as produce the target histogram. Specifically, the input histogram is fitted with the Gaussian distribution whose mean and variance are equal to the brightness mean(${\mu}$) and variance(${\sigma}2$) of the input image, respectively; and the target Gaussian distribution also has the mean of the value ${\mu}$, but takes as the variance the value which is determined such that the output image has the maximum entropy. Experimental results show that compared to the existing methods, the proposed method preserves the mean brightness well and generates more natural looking images.
Keywords
Image Contrast Enhancement; Mean Brightness Preservation; Histogram Specification; Histogram Equalization; Maximum Entropy; Gaussian Distribution;
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Times Cited By KSCI : 2  (Citation Analysis)
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