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Erschienen in:
2005 | OriginalPaper | Buchkapitel
Statistical Tools for Digital Forensics
verfasst von : Alin C. Popescu, Hany Farid
Erschienen in: Information Hiding
Verlag: Springer Berlin Heidelberg
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A digitally altered photograph, often leaving no visual clues of having been tampered with, can be indistinguishable from an authentic photograph. As a result, photographs no longer hold the unique stature as a definitive recording of events. We describe several statistical techniques for detecting traces of digital tampering in the absence of any digital watermark or signature. In particular, we quantify statistical correlations that result from specific forms of digital tampering, and devise detection schemes to reveal these correlations.