一种基于LCD-LED双调制显示器的HDR图像显示方法

提出一种针对HDR图像的显示方法,该方法应用于LCD-LED双调制高动态显示器,旨在使显示器更好地显示HDR图像要求的亮度细节,提高视觉质量。首先,建立HDR图像亮度与LED亮度范围对应关系,使用光扩散函数作为背光LED亮度取值范围的权重。然后,统计LED的亮度辐射区域内不同LED发光强度等级的权重,取权重最大者对应的亮度作为该背光LED亮度。最后,利用依据LED亮度生成LED背光扩散图像与HDR图像计算出LCD显示图像。仿真结果表明,该算法可以使显示器亮度失真率系数低至0.006以下。在LCD-LED双调制高动态显示器上实验验证结果表明,该算法可以有效提高图像的层次感,有效抑制LCD-LED双调制高动态显示器的"光晕"以及亮度截断现象,提高显示质量。

HDR image display algorithm based on LCD-LED dual modulation HDR display

A display algorithm for HDR images on LCD-LED dual modulation high dynamic display was proposed, which aimed to better display the brightness details required by HDR images and improve the visual quality. Firstly, the relationship between the HDR image brightness and the LED brightness range was established. The light diffusion function was used as the weight of the backlight LED brightness value range. Then, the weight of the different LED illumination intensity levels in the luminance radiation area of the LED was counted. The brightness corresponding to the largest weight was taken as the brightness of the backlight LED. Finally, the LCD display image was calculated by generating the LED backlight diffusion image and the HDR image according to the LED. The simulation results show that the algorithm can display the brightness distortion index as low as 0.006 or less. The algorithm is experimentally verified on the LCD-LED dual modulation high dynamic display, which effectively improves the layered feel of the image. The experimental results show that the proposed algorithm can effectively suppress the "halo" and "clipping" effects of LCD-LED dual modulation high dynamic display, and improve display quality.