Statistics of Natural Images and Their Applications to Digital Forensics
Speaker: Siwei Lyu , Computer Science, Darmouth
Date: November 15 2004
Time: 1:00PM to 2:00PM
Location: 32-D507
Host: Bill Freeman
Contact: Greg Shakhnarovich, gregory
Relevant URL: Abstract:
We describe a set of natural image statistics that are built upon a
multi-scale multi-orientation image decomposition (e.g., wavelets).
This set consists of first and higher-order statistics that capture
certain regularities of natural images. I will show how these
statistics can be useful in several digital forensic applications,
including differentiating between photographic and photorealistic
images, and detecting hidden messages embedded within digital images.
[joint work with Hany Farid]
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