Controlling a watermark strength embedded into a digital image
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United States of America Patent
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Apr 11, 2006
Issued Date -
N/A
app pub date -
Jun 7, 2001
filing date -
Jun 7, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
On embedding a watermark in a stream of digital images, a watermark strength is automatically varied in accordance with an amount of the digital images by detecting the amount of the digital images by a detection portion. The amount of the digital images may be measured at every unit time, for example, a unit of block, macroblock, slice, picture. Thus, detectability of the watermark is improved by adjusting the watermark strength on the basis of the amount of the digital images.
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