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AN APPARATUS AND METHOD FOR A GENERALIZED BENFORD'S LAW FOR ANALYSIS OF DCT AND JPEG COEFFICIENTS

机译:用于DCT和JPEG系数分析的广义本福德定律的装置和方法

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.
机译:一种基于本福德定律的新型统计模型的方法和装置,用于块DCT的第一位数和量化的JPEG系数的概率分布。制定了参数对数定律,即广义本福德定律。此外,该模型在图像取证中的一些潜在应用包括对位图格式的图像进行JPEG压缩检测,对JPEG压缩的位图图像进行JPEG压缩Q因子估计以及对双倍压缩的JPEG图像进行检测。实验结果证明了本发明实施例中使用的统计模型的有效性。

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