Contrast Enhancement Using Weighted Coupled Histogram Equalization with Laplace Transform

作     者：Huimin Hao Wenbin Xin Minglong Bu He Wang Yuan Lan Xiaoyan Xiong Jiahai Huang Huimin Hao;Wenbin Xin;Minglong Bu;He Wang;Yuan Lan;Xiaoyan Xiong;Jiahai Huang

作者机构：College of Mechanical and Vehicle EngineeringTaiyuan University of TechnologyTaiyuan 030024China Harbin Electric Machinery Company LimitedHarbin 150040China 

出 版 物：《Journal of Harbin Institute of Technology(New Series)》 (哈尔滨工业大学学报（英文版）)

年 卷 期：2022年第29卷第4期

页      面：32-40页

学科分类：08[工学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Sponsored by the National Key R&D Program of China(Grant No.2018YFB1308700) the Research and Development Project of Key Core Technology and Common Technology in Shanxi Province(Grant Nos.2020XXX001,2020XXX009) 

主　　题：contrast enhancement weighted processing histogram equalization Laplace transform 

摘      要：Histogram equalization is a traditional algorithm improving the image contrast,but it comes at the cost of mean brightness shift and details *** order to solve these problems,a novel approach to processing foreground pixels and background pixels independently is proposed and *** details are mainly contained in the foreground,the weighted coupling of histogram equalization and Laplace transform were adopted to balance contrast enhancement and details *** weighting factors of image foreground and background were determined by the amount of their respective *** proposed method was conducted to images acquired from CVG⁃UGR and US⁃SIPI image databases and then compared with other methods such as clipping histogram spikes,histogram addition,and non⁃linear transformation to verify its *** show that the proposed algorithm can effectively enhance the contrast without introducing distortions,and preserve the mean brightness and details well at the same time.