保持局部对比度的动态范围压缩算法  

Dynamic range compression with local contrast preservation

作　　者：燕明[1] 胡越黎[1] 胡云生[2] 

机构地区：[1]上海大学上海市电站自动化技术重点实验室,上海200072 [2]上海大学微电子研究与开发中心,上海200072

出　　处：《上海大学学报（自然科学版）》2017年第5期682-689,共8页Journal of Shanghai University:Natural Science Edition

摘　　要：针对高动态范围图像在显示时不能突出部分细节的缺点,提出了一种保持局部对比度的动态范围压缩算法,解决了传统算法在动态范围压缩时会降低局部对比度和影响高亮区域的缺陷,提出了新的S形亮度转换曲线,即通过控制S形亮度映射曲线的强度来提高图像低照度和增强强光区域的显示效果.实验结果表明,该算法可以有效压缩动态范围,使图像拥有较好的视觉效果.As partial detail in a high dynamic range image cannot be shown on a common display, a dynamic range compression algorithm with local contrast preservation is pre- sented. This paper addresses the problem that ordinary algorithms reduce local contrast and damage highlighted regions, and proposes a new S shaped luminance mapping curve. Luminance is successfully enhanced by controlling intensity of the curve. Experimental results show that the algorithm can effectively compress the image dynamic range with good visual effect.

关 键 词：动态范围压缩 局部对比度 亮度映射曲线 

分 类 号：TN911.73[电子电信—通信与信息系统]