Patent ID: 6778682
Filing Date: 2004-08-17
Classification: G06Q,G06T,G07C,G07D,G07F,G10L,G11B,H04B,H04N

Abstract:
A data hiding method that includes changing values of input pixels corresponding to an input two-dimensional image to encode an N-bit auxiliary data signal therein, thereby yielding encoded output pixels defining an encoded output image, wherein N comprises at least two, the method being characterized in that the N-bit auxiliary data signal is redundantly encoded in the image by at least: changing values of input pixels in a first image location according to a first pattern in order to encode the N-bit auxiliary data signal therein; changing the pattern according to a key to yield a second pattern; and changing values in a second image location according to the second pattern in order to encode the N-bit auxiliary data signal therein.