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An automatic image enhancement method based on the improved HCTLS
Chen, Junyu1,2; Liu, Jiahang1; Zhou, Chenghu2,3; Zhu, Feng1,2; Chen, Tieqiao1,2; Zhang, Hang1,2
2018-10-08
会议名称10th IAPR Workshop on Pattern Recognition in Remote Sensing, PRRS 2018
会议录名称2018 10th IAPR Workshop on Pattern Recognition in Remote Sensing, PRRS 2018
会议日期2018-08-19
会议地点Beijing, China
出版者Institute of Electrical and Electronics Engineers Inc.
产权排序1
摘要

Remote sensing images often suffer low contrast, and the efficiency and robustness of contrast enhancement for remote sensing images is still a challenge. To meet with the requirements of applications, Liu et al recently proposed a self-adaptive contrast enhancement method (HCTLS) based on the histogram compacting transform (HCT). In this method, some gray levels on which the frequency is smaller than a certain reference, will merged into their adjacent levels for a compact level distribution. However, if the merged levels whose corresponding pixels in some connected regions, local contrast of these connected regions will decrease, even disappear. In this paper, an improved enhancement method (DPHCT) for remote sensing image based on the HCTLS is presented for preserving more the local detail and contrast. Firstly, extracting the connected regions from the enhanced result by HCT where the local contrast is decreased or disappeared. These connected regions are decomposed into the inner regions and the boundary regions adaptively. Then, construct pixel values by using the unified brightness function to maintain the contrast for the connected regions inside. At the same time eliminate stitching lines by using a weighted fusion spliced algorithm to eliminate the problem of borders outstanding in result of intensity roughness. Finally, the image is normalized into [0, 255] by linear stretch. Experimental results indicate that the proposed algorithm not only can enhance the global contrast but also can preserve local contrast and details. ? 2018 IEEE.

作者部门遥感与智能信息系统研究中心
DOI10.1109/PRRS.2018.8486212
收录类别EI
ISBN号9781538684795
语种英语
EI入藏号20184706085075
引用统计
文献类型会议论文
条目标识符http://ir.opt.ac.cn/handle/181661/30863
专题遥感与智能信息系统研究中心
作者单位1.Xi'An Institute of Optics and Precision Mechanics of CAS, Xi'an; 710119, China;
2.University of Chinese Academy of Sciences, Beijing; 100049, China;
3.Institute of Geographic Sciences and Natural Resources Research of CAS, Beijing; 100049, China
推荐引用方式
GB/T 7714
Chen, Junyu,Liu, Jiahang,Zhou, Chenghu,et al. An automatic image enhancement method based on the improved HCTLS[C]:Institute of Electrical and Electronics Engineers Inc.,2018.
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