Steganographic capacity of images, based on image equivalence classes

Authors:
Klaus Hansen;Christian Hammer;Lars R. Randleff;Jens D. Andersen
Affiliations:
University of Copenhagen, Copenhagen Ø, Denmark;-;-;-
Venue:
MM&Sec '01 Proceedings of the 2001 workshop on Multimedia and security: new challenges
Year:
2001

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Abstract

The problem of hiding information imperceptibly can be formulated as the problem of determining if a given image is a member of a sufficiently large equivalence class of images which to the Human Visual System appears to be the same image. This makes it possible to replace the given image with a modified image similar in appearance but carrying imperceptibly coded information. This paper presents a framework and an experimental algorithm to estimate upper bounds for the size of an equivalence class.