Method and apparatus for data hiding in printed images
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United States of America Patent
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-
Jun 25, 2002
Grant Date -
N/A
app pub date -
Apr 15, 1998
filing date -
Apr 15, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A technique for embedding a mark in an a printed image allows its interpretation by an inexpensive printing system. Values of a characteristic parameter are altered in a portion of the host image confined to a thread, i.e. a region of contiguous points in the image, small enough to be included in the print space treated by the printer in a single pass of the printing head.
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