工程科学学报2017，Vol.39Issue(12)：1888-1897,10.DOI:10.13374/j.issn2095-9389.2017.12.016
一种提高图像对比度和视觉质量的新型区域背光算法
A novel local dimming algorithm to improve image contrast and visual quality
摘要
Abstract
With the emergence of high dynamic range ( HDR) images and videos, improving the liquid crystal display ( LCD) technology has become an urgent requirement. The development of HDR display systems is becoming the focus of research in the dis-play technology. To improve the dynamic range of LCDs to the best possible extent, a local dimming algorithm based on dynamic-threshold backlight luminance extraction and two-step liquid crystal pixel compensation was proposed to improve the dynamic range of a backlight model and an LCD panel, thereby enhancing the contrast and visual quality of the dimmed image. The experimental results demonstrate that the proposed algorithm can improve the image contrast ratio by approximately 113. 60% on average. Additionally, on the direct white light-emitting diode backlight LCD, specific images were used to verify the accuracy of the proposed algorithm. The display effects indicate that the layering and color of dimmed images are enhanced and the image contrast ratio is improved. Based on these results, it can be concluded that the proposed algorithm can effectively improve both the contrast of LCDs and the display quality.关键词
高动态范围/区域背光/背光亮度/像素补偿/对比度Key words
high dynamic range/local dimming/backlight luminance/pixel compensation/contrast ratio分类
信息技术与安全科学引用本文复制引用
张涛,巫红英,李蒙,雷志春..一种提高图像对比度和视觉质量的新型区域背光算法[J].工程科学学报,2017,39(12):1888-1897,10.基金项目
天津市科技计划资助项目(16YFZCGX00760) （16YFZCGX00760）
图像视频HDR显示研究资助项目(2016120024000202) （2016120024000202）
