摘要
针对目前利用单幅低动态范围图像生成高动态范围图像过程中亮度的动态范围扩展与饱和度不匹配,从而导致扩展后图像泛白的问题,提出一种结合饱和度调节的由单幅图像生成高动态范围图像的方法.该方法将图像转换到HSV颜色空间,首先对亮度分量进行反色调映射及高光区域校正得到新的亮度分量,并对饱和度分量进行线性拉伸;然后计算原始亮度与饱和度的相关系数,再通过相关系数和新亮度分量对拉伸后的饱和度分量进行微调得到新饱和度分量;最后将处理后的各分量进行融合得到高动态范围图像.实验结果表明,该方法能产生颜色鲜亮的高动态范围图像,更符合人眼的视觉特性.
Aiming at the problem that dynamic range expansion of brightness did not match saturation in the process of using a single low dynamic range image to generate high dynamic range(HDR)images,which resulted in image whitening after expansion.We proposed a method of generating HD R image from a single image combined with saturation adjustment.This method converted the image into HSV color space.Firstly,the new brightness component was obtained by inverse tone mapping and high-light region correction,and the saturation component was linearly stretched.Secondly,the correlation coefficient between origin al brightness and saturation was calculated,and then the new saturation component was obtained by fine-tuning the saturation component after stretching through correlatio n coefficient and new brightness component.Finally,the processed components were fused to get the high dynamic range image.The experimental results show that the method can produce high dynamic range images with bright colors,which is more in line with the visual characteristics of human eyes.
作者
张媛媛
张红英
ZHANG Yuanyuan;ZHANG Hongying(School of Information Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan Province,China)
出处
《吉林大学学报（理学版）》
CAS
北大核心
2021年第2期309-318,共10页
Journal of Jilin University:Science Edition
基金
国防科工局项目(批准号:JCKY2018404C001,JCKY2019204B007,科工二司[2019]1276号).
关键词
高动态范围图像
饱和度调节
相关系数
HSV颜色空间
high dynamic range image
saturation adjustment
correlation coefficient
HSV color space
