| JPEG图像重压缩检测综述 |
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| 引用本文： | 黄方军,万晨.JPEG图像重压缩检测综述[J].信号处理,2021,37(12):2251-2260. |
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| 作者姓名： | 黄方军 万晨 |
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| 作者单位： | 中山大学计算机学院 |
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| 基金项目： | 国家自然科学基金项目(62072481,61772572) |
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| 摘 要： | JPEG（Joint Photographic Experts Group，联合图像专家小组）是目前互联网上运用最为广泛的图像格式。已有的案例表明，许多篡改操作都发生在JPEG图像上，其操作基本流程是首先对JPEG文件进行解压，在空域进行篡改，篡改完成后再将篡改后的图片压缩保存为JPEG格式，这样篡改后的图片就可能会被两次甚至多次JPEG压缩。因此，JPEG图像的重压缩检测可以作为判断图像是否经过篡改的重要依据，对JPEG图像进行分析和取证具有非常重要的意义。本文主要从JPEG重压缩过程中量化表保持不变和量化表不一致这两个方面，对近年来JPEG重压缩检测领域的文献进行了一个回顾，介绍了该领域一些代表性的方法。最后我们还分析了JPEG重压缩领域存在的问题，并对未来的发展方向进行了展望。
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| 关 键 词： | JPEG 重压缩检测 篡改 |
| 收稿时间： | 2021-06-22 |
Review of JPEG image recompression detection |
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| Affiliation: | School of Computer Science and Engineering, Sun Yat-Sen UniversityGuangdong Provincial Key Laboratory of Information Security Technology |
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| Abstract: | JPEG (Joint Photographic Experts Group) is the most widely used image format on the Internet. Previous studies have shown that many tampering operations are conducted on JPEG images. The basic operation process is to decompress the JPEG file firstly, and then tamper it in the space domain. After tampering, the tampered image will be compressed again and saved in JPEG format. In this way, the tampered image may be JPEG compressed twice or even several times. Therefore, the recompression detection result of JPEG image can be used to judge whether the image has been tampered, which is of great significance to JPEG image analysis and forensics. In this paper, we review the related literatures, and introduce some representative methods in the field of JPEG recompression detection from two aspects, i.e., the quantization table is inconsistent and remains unchanged. Finally, the existing problems in the field of JPEG recompression are analyzed, and the future development direction is prospected. |
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