4 February 2013 Content-dependent contrast enhancement for displays based on cumulative distribution function
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Perceived contrast is one of the most important attributes affecting image quality on displays. Three dimensional digital TVs need contrast enhancement techniques to compensate for reduction in luminance levels. Also, mobile displays demand efficient contrast enhancement techniques to improve degree of visibility under outdoor viewing environment and reduce power consumptions. This paper presents a new content dependent contrast enhancement technique to improve perceived image quality on displays. It is designed for real time implementation. Pairs of reference cumulative distribution functions (CDF) of luminance level and corresponding tone mapping functions (TMFs) are generated by off-line procedure. For real time implementation, an appropriate TMF is selected by comparing the CDF of input image and reference CDFs. The selected TMF is then applied to an input image.
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Seul Ki Jang, Seul Ki Jang, Yoon-Gyoo Lee, Yoon-Gyoo Lee, Gyoung-Soo Park, Gyoung-Soo Park, Choon-Woo Kim, Choon-Woo Kim, } "Content-dependent contrast enhancement for displays based on cumulative distribution function", Proc. SPIE 8652, Color Imaging XVIII: Displaying, Processing, Hardcopy, and Applications, 86520Y (4 February 2013); doi: 10.1117/12.2007236; https://doi.org/10.1117/12.2007236

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