An approach to expose dithering-based JPEG anti-forensics
Forensic Science International(2021)
摘要
•A technique for differentiating genuine uncompressed images from anti-forensically altered uncompressed images.•The proposed technique exploits the spread of DCT coefficients around integer multiple of quantization step size.•The performance of the proposed method is evaluated in terms of area under curve (AUC) and true positive rate (TPR).
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关键词
Anti-forensics,Blocking artefacts,Quantization artefacts,Discrete cosine transform
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