Digital watermarked imagery, video, maps and signs
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United States of America Patent
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Aug 2, 2011
Grant Date -
Apr 17, 2008
app pub date -
Oct 2, 2006
filing date -
Mar 5, 2001
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Imagery, video, maps or signs are embedded with plural-bit data in the form of digital watermarking. In one embodiment, a method includes obtaining a media signal representing an image or video; introducing digital watermarking into the media signal, the digital watermarking slightly altering samples of the media signal; and the digital watermarking changing across the media signal so as to convey first information related to at least a first area depicted in the image or within data representing a first portion of the video in the media signal and second, different information related to at least a second area depicted in the image or within data representing a second portion of the video in the media signal. Other embodiments are provided as well.
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