JPEG detectors and JPEG image history estimators

Details JPEG detectors and JPEG image history estimators JPEG detectors and JPEG image history estimators

2005-10-03

2010-06-29

Werner, Brian P (Department: 2624)

Image analysis

Pattern recognition

Classification

C382S232000

Reexamination Certificate

active

07747082

ABSTRACT:
An image is classified respective to JPEG compression history. An image signature is derived from the image. The image signature is indicative of spatial frequencies content of chrominance components of the image including spatial frequencies content associated with JPEG compression. The image is classified respective to whether the image has undergone JPEG compression based on analysis of the image signature.

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