期刊文献+

消除光晕现象的快速Retinex图像增强 被引量:46

A Fast Halo-Free Image Enhancement Method Based on Retinex
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摘要 由于假设场景中光照是平缓变化的,传统的中心/环绕Retinex图像增强方法在处理高动态范围图像时易在明暗对比强烈处产生光晕现象.提出一种快速Retinex图像增强方法,以模拟人类视觉系统的全局和局部自适应性.首先对原图进行全局动态范围调整,然后使用mean shift滤波进行估计光照,并基于中心/环绕假设消除光照不均影响,在后处理中对图像去除孤立点所占的直方图范围.实验结果表明,该方法能有效地克服光照不均并消除了光晕现象;使用了mean shift加速算法,运行速度快于已有同类方法. Based on the assumption of spatially smooth illuminant, traditional center/surround-based Retinex enhancement methods suffer the existence of halo artifacts. In this article, we propose a fast Retinex image enhancement method that models global and local adaptation of the human visual system. A global dynamic range adjustment is performed first. Then mean shift filtering on the image is carried out in the illuminant estimation step, and the spatial-varying illuminant is eliminated base on the center/surround hypothesis. Outliers at both extremities of the histogram are removed in the post processing step. Experimental results demonstrate that our method efficiently renders high dynamic range images and reduces halo artifacts. An accelerated implementation of mean shift is employed, thus our method is much faster than previous methods.
出处 《计算机辅助设计与图形学学报》 EI CSCD 北大核心 2008年第10期1325-1331,共7页 Journal of Computer-Aided Design & Computer Graphics
基金 国家自然科学基金(60773172) 江苏省自然科学基金(BK2006704-2) 江苏省博士后基金(AB41158) 香港特区政府研究资助局研究项目(CUHK/4185/00E) 香港中文大学研究基金(2050345)
关键词 RETINEX 图像增强 光晕现象 mean SHIFT Retinex image enhancement halo artifact mean shift
作者简介 许欣,男,1982年生,博士研究生,主要研究方向为图像处理与识别.(xuxinn@gmail.com) 陈强,男,1979年生,博士,讲师,主要研究方向为图像处理、计算机视觉、模式识别. 王平安,男,1961年生,博士,教授,博士摩导师,主要研究方向为交互式科学计算可视化、三维医学图像、三维用户界面、计算机图形学等. 孙怀江,男,1968年生,博士,研究员,博士生导师,CCF高级会员,主要研究方向为证据理论、信任管理、模式识别. 夏德深,男,1941年生,博士,教授,博士生导师,CCF高级会员,主要研究方向为网像处理、卫星遥感、模式识别.
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参考文献17

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二级参考文献26

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