| 基于JPEG块效应差异的图像篡改区域自动定位 |
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| 引用本文： | 王鑫,鲁志波.基于JPEG块效应差异的图像篡改区域自动定位[J].计算机科学,2010,37(2):269-273. |
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| 作者姓名： | 王鑫 鲁志波 |
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| 作者单位： | 1. 信息工程大学应用数学系,郑州,450002
2. 信息工程大学理学院数理系,郑州,450001 |
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| 基金项目： | 国家科技支撑计划重点项目(2006BAK07B04);;国家自然科学基金(60803155)资助 |
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| 摘 要： | 不同JPEG栅格位置或不同压缩质量的图像区域被合成为篡改图像时会出现JPEG块效应的差异,据此提出了一种能自动定位篡改区域的图像盲被动取证方法。算法先通过一种基于小波的图像去噪方法提取噪声,利用噪声衡量局部JPEG块效应以提高块效应信号的信噪比;然后通过迭代方法寻找到合适的阈值,在块效应直方图中分离出篡改区域。针对不同类型的篡改区域的实验说明了算法的有效性。
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| 关 键 词： | 图像取证 图像篡改 块效应 JPEG |
| 收稿时间： | 2009/3/17 0:00:00 |
| 修稿时间： | 2009/5/25 0:00:00 |
Locate Tampered Image Region Automatically Based on Inconsistency of ,JPEG Blocking Artifacts |
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| WANG Xin,LU Zhi-bo.Locate Tampered Image Region Automatically Based on Inconsistency of ,JPEG Blocking Artifacts[J].Computer Science,2010,37(2):269-273. |
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| Authors: | WANG Xin LU Zhi-bo |
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| Affiliation: | Department of Applied Math./a>;Information Engineering University/a>;Zhengzhou 450002/a>;China;Institute of Sciences/a>;Zhengzhou 450001/a>;China |
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| Abstract: | Inconsistency of blocking artifacts is introduced when image regions with different JPEG quality factors or grids are spliced for forgery.A novel image forgery detection method was proposed to automatically locate the tampered regions.The compression noise was firstly extracted from the images using a wavelet-based denoising filter.The proposed method measured the JPEG blocking artifact using the compression noise to improve the SNR.Then an appropriate threshold was found using an iterative method to separa... |
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| Keywords: | Image forensics Image forgery Blocking artifacts JPEG |
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