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Apparatus and method for a generalized benford's law analysis of DCT and JPEG coefficients
Apparatus and method for a generalized benford's law analysis of DCT and JPEG coefficients
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机译:DCT和JPEG系数的广义本福德定律分析的设备和方法
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摘要
A method and apparatus for a novel statistical model based on Benford's law for the probability distributions of the first digits of the block-DCT and quantized JPEG coefficients. A parametric logarithmic law, the generalized Benford's law, is formulated. Furthermore, some potential applications of this model in image forensics, which include the detection of JPEG compression for images in bitmap format, the estimation of JPEG compression Q-factor for JPEG compressed bitmap image, and the detection of double compressed JPEG image. Experimental results demonstrate the effectiveness of the statistical model used in embodiments of the invention.
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