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Power constrained contrast enhancement based on brightness compensated contrast-tone mapping operation

[+] Author Affiliations
Cheolkon Jung, Haonan Su, Lu Wang, Peng Ke

Xidian University, School of Electronic Engineering, 2 South Taibai Road, Xi’an 710071, China

J. Electron. Imaging. 25(5), 053027 (Oct 12, 2016). doi:10.1117/1.JEI.25.5.053027
History: Received May 9, 2016; Accepted September 14, 2016
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Abstract.  We propose power constrained contrast enhancement based on brightness compensated contrast-tone mapping operation (BCCTMO). We adopt brightness compensation to restore the original perceptual luminance and combine tone mapping with contrast enhancement to improve image quality. First, we increase pixel values to compensate for the reduced brightness caused by backlight dimming while maintaining the perceived luminance. Then we perform a contrast-tone mapping operation to reduce the information loss caused by the brightness compensation and enhance contrast in images. Finally, we conduct color scaling to reproduce natural colors. We implement BCCTMO on an Android tablet with an LCD display using mathematical approximation. Experimental results demonstrate that BCCTMO produces high-quality images while minimizing distortions and saving power compared with state-of-the-art methods.

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Citation

Cheolkon Jung ; Haonan Su ; Lu Wang and Peng Ke
"Power constrained contrast enhancement based on brightness compensated contrast-tone mapping operation", J. Electron. Imaging. 25(5), 053027 (Oct 12, 2016). ; http://dx.doi.org/10.1117/1.JEI.25.5.053027


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