改进的直方图均衡化与双边滤波的X射线图像对比度增强算法  

Improved Histogram Equalization and Bilateral Filtering X-Ray Image Contrast Enhancement Algorithm

作　　者：赵爱玲 张鹏程[1,2] 杨一鸣 陈燕[1,2] 刘祎[1,2] 桂志国[1,2] ZHAO Ai-ling;ZHANG Peng-cheng;YANG Yi-ming;CHEN Yan;LIU Yi;GUI Zhi-guo(School of Information and Communication Engineering,North University of China,Taiyuan 030051,China;Shanxi Provincial Key Laboratory for Biomedical Imaging and Big Data,North University of China,Taiyuan 030051,China)

机构地区：[1]中北大学信息与通信工程学院,山西太原030051 [2]生物医学成像与影像大数据山西重点实验室(中北大学),山西太原030051

出　　处：《中北大学学报（自然科学版）》2020年第6期564-570,共7页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61801438);中北大学青年学术带头人项目(QX201801);山西省应用基础研究项目(201801D221196)。

摘　　要：针对传统技术在处理非等厚构件X射线图像时,易出现不同区域处理效果差别大、全局处理效果不均匀等的问题,提出一种X射线图像对比度增强算法.首先采用改进的直方图均衡化算法对X射线图像对比度增强,然后采用双边滤波抑制图像中的噪声,最后采用改进的基于摄影的全局色调映射方法,使动态范围较大的X射线图像可以在显示设备上清晰地显示.实验结果表明,该方法可以有效提高图像的对比度和清晰度.When dealing with X-ray images of non-equal thickness components in the traditional technology,it was easy to have problems such as large difference in processing effects in different regions and uneven global processing effects.An improved X-ray image contrast enhancement method is proposed.Firstly,the improved histogram Equalization was used to enhance the X-ray image,and then the bilateral filtering was used to denoise the image.Finally,an improved photography-based global tone mapping method was adopted,so that the X-ray image with a large dynamic range can be displayed well on the display device.The experimental results show that this method can effectively improve the contrast and sharpness of the image.

关 键 词：直方图均衡化 双边滤波 色调映射 图像增强 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]