| 基于Tchebichef矩的区域复制窜改检测算法* |
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| 引用本文： | 谷宗运,吕皖丽,罗斌.基于Tchebichef矩的区域复制窜改检测算法*[J].计算机应用研究,2011,28(10):3842-3844. |
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| 作者姓名： | 谷宗运 吕皖丽 罗斌 |
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| 作者单位： | 1. 安徽中医学院医药信息工程学院,合肥230031;安徽大学计算智能与信号处理教育部重点实验室,合肥230039
2. 安徽大学计算智能与信号处理教育部重点实验室,合肥,230039 |
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| 基金项目： | 国家自然科学基金资助项目(60772122)；安徽省高等学校省级自然科学研究重点项目(KJ2007A045) |
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| 摘 要： | 提出了一种新的数字图像被动认证算法，用于检测同幅图像的区域复制窜改问题。算法首先利用离散小波变换提取图像的低频分量，再对低频分量进行分块并提取每一块的离散正交Tchebichef矩特征；然后将特征矢量进行字典排序，比较相邻两组特征矢量的相似性；最后利用阈值判别实现窜改伪造区域的检测和定位。实验结果证明，算法能较好地检测及定位出图像中复制与窜改区域，且具有运算量小、检测效率高、鲁棒性好等特点。
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| 关 键 词： | Tchebichef矩 离散小波变换 区域复制窜改 窜改检测 被动认证 |
Detection algorithm for region duplication forgery based on Tchebichef moments |
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| GU Zong-yun,LV Wan-li,LUO Bin.Detection algorithm for region duplication forgery based on Tchebichef moments[J].Application Research of Computers,2011,28(10):3842-3844. |
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| Authors: | GU Zong-yun LV Wan-li LUO Bin |
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| Affiliation: | GU Zong-yun1,2,LV Wan-li2,LUO Bin2(1.Information Engineering College of Traditional Chinese Medicine,Anhui University of Traditional Chinese Medicine,Hefei 230031,China,2.School of Computer Science & Technology,Anhui University,Hefei 230039,China) |
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| Abstract: | This paper presented a new passive image authenticate algorithm which could detect the type of region duplication forgery in a single digital image.After extacting the image low-frequency by DWT,this algorithm applied the discrete orthogonal Tchebichef moments invariants to the fixed sized overlapping blocks of a low-frequency image in the wavelet sub-band.Then,it sorted the eigenvectors lexicographically,matched the similarity of neighboring eigenvectors,and identified the forgery part by the threshold fin... |
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| Keywords: | Tchebichef moments discrete wavelet transform(DWT) region duplication forgery forgery detection passive authentication |
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