Importance

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Abstract

A method is presented for encoding auxiliary information in digital images which enables the encoding of both compact auxiliary information specific to a given image and a secret message into a given image such that the hidden message contained therein is only revealed in such a way that neither the image itself nor the auxiliary information alone are sufficient to reveal the secret message. Specifically, a method for encoding an auxiliary message in a digital image, is presented having the first step of creating a set of Training Vectors from all N.times.N windowed observations of a digital image (D) and corresponding pixels of a message (I). Then, statistically estimating a function T from the set of Training Vectors which map the N.times.N windowed observations of the digital image (D) to the corresponding pixels of the message (I); and writing out the statistically estimated function T as a representation of the hidden message.

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First Claim