基于三级图像融合与CLAHE的机场安检X光图像增强算法  

Airport Security X-ray Image Enhancement Algorithm Based on Three-level Image Fusion and CLAHE

作　　者：高强[1] 陈裕通 潘俊[1] GAO Qiang;CHEN Yu-Tong;PAN Jun(Airport Management College,Guangzhou Civil Aviation College,Guangzhou 510403,China)

机构地区：[1]广州民航职业技术学院航空港管理学院,广州510403

出　　处：《计算机系统应用》2022年第8期280-285,共6页Computer Systems & Applications

基　　金：广州市科技计划(201904010226);广东省普通高校青年创新人才项目(2018GkQNCX080,2019GKQNCX096)。

摘　　要：针对CLAHE增强机场安检X光图像出现的颜色失真及背景噪声放大问题,提出一种基于三级图像融合与CLAHE的X光图像增强算法.首先将X光图像分别转换成RGB、HSV图像并分别进行CLAHE增强,将增强后的图像通过欧几里得范数实现第1级融合.然后将融合后的图像进行USM锐化,锐化过程中根据掩膜进行图像第2级融合.最后将锐化后的图像与原图像按系数进行合并,完成第3级融合.仿真实验结果表明,本文提出的算法能够有效提高安检X光图像的对比度,PSNR平均值提高了7 dB,同时可以抑制增强图像颜色失真及背景噪声.该算法有助于提高X光图像中违禁物品的识别准确率,对平安机场的构建具有积极意义.Given the problems of color distortion and background noise amplification using contrast limited adaptive histogram equalization(CLAHE)to enhance X-ray images of airport security inspection,this study proposes an X-ray image enhancement algorithm based on three-level image fusion and CLAHE.Specifically,the X-ray image is converted into RGB and HSV images for CLAHE enhancement respectively.The enhanced images are fused by the Euclidean norm for the first-level fusion.Then,the fused images are sharpened by unsharp masking(USM),during which the second-level image fusion is performed according to the mask.Finally,the sharpened images and the original image are combined according to the coefficient to complete the third-level fusion.The simulation experiment results show that the proposed algorithm effectively improves the contrast of security inspection X-ray images,increases the average peak signal-tonoise ratio(PSNR)by 7 dB,and suppresses the color distortion and background noise in the enhanced images.This algorithm helps to improve the accuracy of identifying prohibited items in X-ray images and thus has a positive impact on the construction of a safe airport.

关 键 词：机场安检 X光图像 图像融合 CLAHE 图像增强 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] O434.19[自动化与计算机技术—计算机科学与技术]