Method for inserting and detecting electronic watermark data into a digital image and a device for the same
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United States of America Patent
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-
Jul 10, 2001
Grant Date -
N/A
app pub date -
Jan 21, 1999
filing date -
Jan 19, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
An image is divided into blocks, and different electronic watermark data are embedded into every block using a DCT transformer (103), electronic watermark data inserter (104), and IDCT transformer (107). At that time, reference is made to an electronic watermark data insertion position table (105) and electronic watermark data table (106) which specify that which electronic watermark data is to be inserted into which block of the image.
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