Electronic watermark embedding device and electronic watermark detecting device, and electronic watermark embedding method and electronic watermark detecting method implemented therein
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United States of America Patent
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Feb 8, 2005
Grant Date -
Oct 11, 2001
app pub date -
Mar 29, 2001
filing date -
Mar 29, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image analyzing unit analyzes an input image, and determines an embedding intensity level for an electronic watermark to be embedded in units of a pixel of the input image. The image analyzing unit then outputs the embedding intensity information to an electronic watermark pattern embedding unit and a displacement information pattern embedding unit, respectively. The electronic watermark pattern embedding unit embeds in the input image an electronic watermark pattern read from an electronic watermark pattern storage unit. At this time, the electronic watermark pattern is embedded based on the embedding intensity information. The displacement information pattern embedding unit embeds a displacement information pattern read from a displacement information pattern storage unit in the processed image having the electronic watermark pattern embedded therein. At this time, the displacement information pattern is embedded based on the embedding intensity information.
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