Hiding information out-of-phase in color channels
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United States of America Patent
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May 10, 2005
Grant Date -
Nov 14, 2002
app pub date -
Apr 2, 2002
filing date -
Apr 19, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to steganographically hiding images and information. In a preferred embodiment, an image is hidden within a media signal. The media preferably includes a cyan (C) color plane, a magenta (M) color plane, a yellow (Y) color plane and a black (K) color plane. In an alternative embodiment, the media includes a spot color. The image is converted into a black color channel image and is then applied to the media's K channel. The black channel image is inverted and the inverted image is applied to the media's CMY (or spot) color planes.
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