基于复制粘贴篡改的被动图像取证算法的研究  

Research on Passive Image Forensics Algorithm Based on Copy-move Forgery

作　　者：徐长英[1] 王英[1] 

机构地区：[1]青岛大学自动化工程学院,山东青岛266071

出　　处：《工业控制计算机》2015年第6期47-48,共2页Industrial Control Computer

基　　金：国家自然科学基金项目(61272077)

摘　　要：提出一种基于离散小波变换和自相关性分析的同幅图像复制粘贴篡改检测算法。算法利用离散小波变换提取图像的低频子带作为特征向量,采用Pearson相关系数进行相似性匹配检测。实验表明,该算法可以大大减少特征向量的维数和排序矩阵的行数,提高相似块的匹配效率,对一般噪声攻击具有较好的鲁棒性。This paper proposes an image detection algorithm for Copy-move forgery based on the discrete wavelet transform and correlation analysis.In this method,low-frequency sub-band wavelet decomposition which is best approximation of the image is extracted as a feature vector and calculate their Pearson correlation coefficient to detect the similar blocks.The experiments demonstrate that the proposed approach can greatly reduce the dimension of feature vector and accordingly increase detection efficiency of the matching block and had better robustness against noising.

关 键 词：数字图像 复制粘贴篡改 离散小波变换 被动取证 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]