文献类型：会议论文

中文题名：Retinex-based Color Correction for Displaying High Dynamic Range Images

作者：Jinhua Wang;Haijiang Bi

第一作者：王金华

机构：[1]Institute of Information Technology, Beijing Union University, Beijing, China;[2]Datang Software Technologies Co.,Ltd;

第一机构：北京联合大学智慧城市学院

会议论文集：2010 IEEE 10th International Conference on Signal Processing(第十届信号处理国际会议 ICSP 2010)论文集

会议日期：20100824

会议地点：北京

主办单位：中国电子学会;中国仪器仪表学会;中国图象图形学学会

语种：英文

中文关键词：color correction;tone mapping;contrast enhancement;high dynamic range;Retinex

摘要：Until now, most of methods for High Dynamic Range (HDR) images focus on tone mapping. They can compress large range luminance values so that they can be displayed on ordinary devices. However, the lighting condition in which the images are taken is not considered. As a result, the mapped images may have color cast. Therefore, to get an image that is similar to direct observation of a scene for human eyes, tone mapping alone for a HDR image is not sufficient. In order to solve the problem, we propose an Orientation-based Retinex (O_Retinex) method serving as color correction for HDR images. On the other hand, local contrast loss may be caused by most tone mapping methods when the dynamic range of a HDR image is quite high. In our paper, a contrast enhancement technique is proposed to solve the problem. Furthermore, the color correction and the tone mapping are processed in parallel for our method, which is the main difference from other methods that serve the tone mapping as a preprocessing. Because the proposed method uses the parallel processing strategy, it can adopt most of tone mapping methods. The only constraint on them is that the ratios among three color channels must be preserved. Experiments show that the proposed method can efficiently reduce color cast induced by lighting condition for HDR images.