基于色调恒定的MSR图像增强算法  

An Hue Preserving MSR Algorithm of Image Enhancement

作　　者：刘伟华[1,2] 隋青美[1] 

机构地区：[1]山东大学控制科学与工程学院,济南250061 [2]山东经济学院信息管理学院,济南250014

出　　处：《光子学报》2011年第4期642-646,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61074163)资助

摘　　要：由于多尺度Retinex算法增强后图像存在细节信息减弱和颜色失真等不足,本文提出了一种色调恒定的图像增强算法.在原图像中去掉用多尺度高斯函数估计的光照分量,结合参量自适应的非线性函数调整亮度,依据色调恒定的理论保持增强后图像的颜色.与多尺度Retinex比较的实验结果表明,本文算法更有效,增强后的图像不仅细节清晰,而且色彩自然、不失真且运行速度快.Because of the traditional Retinex enhancement algorithms suffering from the loss of details and color distortion in the enhanced image,a hue preserving image enhancement algorithm is proposed in this work.Firstly,illuminant component estimated using multi-scale Gaussian filter is removed from input image.Then,a new adaptive non-linear function is introduced to modify illumination.Finally,hue is preserved according to the theroy of hue invariant.Experimental results show that the proposed algorithm is more effective in terms of visual effects,and the enhanced image is not only more detail preserving,but the colour is also more natural and without distortion,compared with other methods such as MSRCR.

关 键 词：多尺度RETINEX 色调恒定 自适应亮度 图像增强 

分 类 号：TP319.4[自动化与计算机技术—计算机软件与理论]