Chinese Journal of Liquid Crystals and Displays, Volume. 36, Issue 12, 1645(2021)
Environment adaptive tone mapping algorithm for display devices
Ambient light has always been one of the essential obstacles to improving display devices image quality. In this study, a tone mapping algorithm is proposed, which can adjust the luminance and color of the image to achieve reliable luminance mapping and color correction of the image in different luminance ranges. Firstly, the influence of ambient light on the display device is analyzed, and the display device model is established. Secondly, the contrast perception model was used as a bridge to solve the luminance mapping curve to minimize the contrast perception difference. Then, using the color appearance model CAM16, the original image is mapped into the environment where the display device is located, while the perception of color and brightness remains unchanged. Finally, luminance mapping and color correction are combined, and a soft clip function is designed to correct the overexposure problem. Experimental and simulation results show that under different environments, the algorithm can repair the color deviation caused by luminance compression, reduce the color error to less than 60% of the traditional method, reduce the contrast perception error, and obtain a stable image performance. The requirements of display devices in a complex environment can be met.
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GONG Yin-qiang, YU Xin, QIU Guo-ping. Environment adaptive tone mapping algorithm for display devices[J]. Chinese Journal of Liquid Crystals and Displays, 2021, 36(12): 1645
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Received: Apr. 14, 2021
Accepted: --
Published Online: Jan. 1, 2022
The Author Email: GONG Yin-qiang (yqgong@appotronics.cn)