Improved anti-forensics of JPEG compression
Improved anti-forensics of JPEG compression
复制标题
改进了 JPEG 压缩的反取证
DOI:
10.1016/j.jss.2013.12.043
复制
发表时间:
2014-05
影响因子:
3.5
通讯作者:
Zhang, Xinpeng
中科院分区:
文献类型:
--
作者:
Qian, Zhenxing;Zhang, Xinpeng
The comblike histogram of DCT coefficients on each subband and the blocking artifacts among adjacent blocks are the two main fingerprints of the image that was once compressed by JPEG. Stamm and Liu proposed an anti-forensics method for removing these fingerprints by dithering the DCT coefficients and adding noise into the pixels. However, some defects emerge inside the anti-forensically processed images. First, the noise distributions are abnormal in the resulting images; and second, the quality of the processed image is poor compared with the original image. To fill these gaps, this paper proposes an improved anti-forensics method for JPEG compression. After analyzing the noise distribution, we propose a denoising algorithm to remove the grainy noise caused by image dithering, and a deblocking algorithm to combat Fan and Queiroz's forensics method against blocking artifacts. With the proposed anti-forensics method, fingerprints of the comblike histograms and the blocking artifacts are removed, noise distribution abnormality is avoided, and the quality of the processed image is improved.
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DOI:
10.1109/tifs.2012.2234117
发表时间:
2013-02
影响因子:
6.8
作者:
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通讯作者:
G. Valenzise;M. Tagliasacchi;S. Tubaro
DOI:
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发表时间:
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期刊:
--
影响因子:
--
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影响因子:
3.5
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影响因子:
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DOI:
10.1109/tip.2002.807361
发表时间:
2003-02
期刊:
IEEE transactions on image processing : a publication of the IEEE Signal Processing Society
影响因子:
--
作者:
Z. Fan;R. Queiroz
通讯作者:
Z. Fan;R. Queiroz