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一种亮度可控与细节保持的高动态范围图像色调映射方法

DOI: 10.16383/j.aas.2015.c130202, PP. 1080-1092

Keywords: 高动态范围图像,色调映射,细节保持,亮度可控

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Abstract:

?高动态范围(Highdynamicrange,HDR)图像通常需压缩其动态范围,以便于进行存储、传输、重现.本文提出一种具有亮度可控与细节保持特性的HDR图像的全局色调映射方法.该方法对HDR图像照度直方图进行裁剪与补偿,令色调映射后的低动态范围(Lowdynamicrange,LDR)图像仍能够保持原有的细节特性,同时利用概率模型估算出输出LDR图像的亮度与标准差,进而调整直方图亮度区域的分配,使得输出LDR图像的亮度接近用户设置的亮度,最后以分段直方图均衡的方法进行HDR色调映射处理.仿真结果表明,该方法能对HDR图像动态范围进行合理的压缩映射,输出的LDR图像的亮度可由用户控制或自适应选择,同时能保持图像的细节信息,令图像的主观视觉感受对比和谐.

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