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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