运用DWT和ORB的图像篡改检测方法  

Detection of copy-move forgery in image based on DWT and ORB

作　　者：郑继明[1,2] 崔玉岩 耿金玲[2] 陈龙[1] ZHENG Jiming;CUI Yuyan;GENG Jinling;CHEN Long(School of Computer Science and Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;School of Science, Chongqing University of Posts and Telecommunications, Chongqing 400065, China)

机构地区：[1]重庆邮电大学计算机科学与技术学院,重庆400065 [2]重庆邮电大学理学院,重庆400065

出　　处：《计算机工程与应用》2017年第11期187-191,共5页Computer Engineering and Applications

基　　金：重庆市教育委员会科学技术研究项目(No.KJ1400428)

摘　　要：针对数字图像常见的区域复制篡改方式和实时特征提取要求,结合离散小波变换(DWT)和ORB特征提取算法,提出了一种高效的数字图像区域复制篡改检测方法。该方法首先使用DWT将图像分解为LL、LH、HL、HH四部分;然后将ORB算法作用于LL部分,提取关键点,构建二进制描述向量r BRIEF;最后使用汉明距离匹配相似关键点,达到检测图像篡改的目的。通过实验结果证明,该方法不仅可以有效地检测出区域复制篡改图像,同时对平移、旋转、噪音和综合攻击后的篡改图像具备一定的鲁棒性,且与SIFT等算法相比具有更短的检测时间和更少的存储空间。An efficient digital image tamper detection method is presented in this paper,which combines Discrete Wavelet Transform(DWT)with ORB feature extraction algorithm.It can meet the requirements of real-time feature extraction and copy-move tamper detection.Frist DWT is applied on an image to decompose it into LL,LH,HL and HH four parts.Then ORB algorithm is applied on LL part to extract the key points,binary descriptor vector-rBRIEF is constructed.Finally,to achieve the purpose of tamper detection,hamming distance is applied to match similar key points.The experimental results show that the method can effectively detect this type of tampering for images,and it shows robustness when tempered image receives translation,rotation,noise and synthesized attack.Simultaneously,the matching time and storage type are less than SIFT algorithm.

关 键 词：copy-move篡改 离散小波变换(DWT) ORB方法 特征提取 篡改检测 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]