Method for identifying marked images based at least in part...

Image analysis – Learning systems – Trainable classifiers or pattern recognizers

Reexamination Certificate

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Details

Other Related Categories

C382S100000, C382S191000, C380S038000

Type

Reexamination Certificate

Status

active

Patent number

07925080

Description

ABSTRACT:
Briefly, in accordance with one embodiment, a method of identifying marked images based at least in part on frequency domain coefficient differences is disclosed.

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Manikopoulos et al, Detection of block DCT-based Steganography in gray scale images, 2002 IEEE, pp. 355-358.
International Search Report and Written Opinion, PCT/US06/01393, Jul. 15, 2008.
International Preliminary Report on Patentabilty issued in related International Application No. PCT/US2006/001393 on Apr. 28, 2009.

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