快速Retinex彩色图像增强  

Fast Retinex-based color image enhancement

作　　者：许欣[1] 陈强[1] 孙怀江[1] 夏德深[1] 

机构地区：[1]南京理工大学计算机科学与技术学院,南京210094

出　　处：《计算机工程与应用》2010年第5期4-6,72,共4页Computer Engineering and Applications

基　　金：国家自然科学基金No.60805003;No.60773172;江苏省博士后基金No.AD41158~~

摘　　要：提出了一种快速Retinex彩色图像增强方法,模拟了人类视觉系统全局和局部自适应性。首先对图像的亮度范围做全局调整;然后在光照估计步骤中对亮度进行MeanShift滤波,用于其后光照影响的消除;最后对增强结果进行颜色恢复并进行了后处理。实验结果表明,方法能够有效压缩图像的动态范围,克服光照不均的影响,有效去除了光晕现象,且方法的颜色保持性较同类方法更好。使用了MeanShift加速算法,方法运行速度快于此前提出的方法。In this paper a fast Retinex-based color image enhancement method is proposed.Global and local adaptation of the human visual system are simulated.A global dynamic range adjustment is performed first.Then Mean Shift filtering is performed on the original image in the illuminant estimation step,and the spatial-varying illuminant is eliminated base on the center/surround hypothesis.Finally steps of color restoration and post-processing are carried out.Experimental results demonstrate that this method can efficiently reduce halo artifacts and color of the original image is better preserved.An accelerated implementation of Mean Shift is employed.Thus this method is much faster than previous methods.

关 键 词：图像增强 RETINEX Mean SHIFT 光晕现象 颜色保持 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]