Color Enhancement With Adaptive Illumination Estimation for Low-Backlighted Displays

In this paper, we propose an image enhancement system to maintain human visual perception for low-backlighted LCD or LED displays. Adopting the low-backlight mode can save electrical power and extend battery life. First, we examine the relationship between the image and backlight to maintain visual perceptual quality. Then, we use an adaptive illumination estimation to decompose the image intensity into an illumination layer and a reflectance layer with multiscale and parallel perspectives. We then refer to the given backlight level and our derived image-backlight relationship to compensate the illumination layer and meanwhile enhance the reflectance layer. Finally, we also boost the color saturation. Experiments using both numerical blind/referenceless image spatial quality evaluator and subjective mean opinion score demonstrate that our system outperforms existing systems.