Apparatus and method for embedding information in an image through requantization step width control
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
Jun 2, 2000
filing date -
Jun 18, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
When information is embedded in image data by requantization, there is a trade-off relationship between a decline in image quality and resistance of the embedded information. Accordingly, the image characteristics in the vicinity of a pixel of interest in which information is to be embedded are determined and, on the basis of the result of determination, the requantization step width which prevails when the information is embedded in the pixel of interest is controlled.
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