Image data processor
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United States of America Patent
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-
Jun 12, 2001
Grant Date -
N/A
app pub date -
Oct 31, 1997
filing date -
Sep 30, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An encoder, which comprises a means 40 for embedding a specific electronic mark data in a characteristic part of an image converted to a spatial frequency area, a quantizing means 50 for quantizing the spatial frequency area data in which the electronic mark data is embedded and a variable length encoder 60 for variable length coding the quantizer output, outputs compression coded digital image data. A decoder comprises a variable length decoder 80 and reverse quantizer 90 for restoring compression encoded digital image data to spatial frequency area data, means 120 for detecting the electronic mark data from the restored data, and detection display means 130 for displaying the detection result.
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