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

Cheolkon Jung; Haonan Su; Lu Wang; Peng Ke

doi:10.1117/1.JEI.25.5.053027

12 October 2016 Power constrained contrast enhancement based on brightness compensated contrast-tone mapping operation

Cheolkon Jung, Haonan Su, Lu Wang, Peng Ke

Author Affiliations +

Journal of Electronic Imaging, Vol. 25, Issue 5, 053027 (October 2016). https://doi.org/10.1117/1.JEI.25.5.053027

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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Cheolkon Jung, Haonan Su, Lu Wang, and Peng Ke "Power constrained contrast enhancement based on brightness compensated contrast-tone mapping operation," Journal of Electronic Imaging 25(5), 053027 (12 October 2016). https://doi.org/10.1117/1.JEI.25.5.053027

Published: 12 October 2016

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