Patent ID: 6891959
Filing Date: 2005-05-10
Classification: B42D,G06F,G06K,G06Q,G06T,G07C,G07D,G07F,G10L,G11B,H04N

Abstract:
1. A method of steganographically hiding a first image in a second image, the second image comprising at least a cyan (C) color channel, a magenta (M) color channel, a yellow (Y) color channel and a black (K) color channel, said method comprising: providing a first set of signal modifications corresponding to the first image; modifying the K color channel with the first set of signal modifications; providing a second set of signal modification corresponding to the first image, the second set of signal modifications being inverted with respect to the first set of signal modifications; and modifying the C, M and Y color channels with the second set of signal modifications.