Watermarking a page description language file
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United States of America Patent
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Jul 24, 2012
Grant Date -
Dec 29, 2005
app pub date -
May 31, 2005
filing date -
Jan 30, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention provides methods and systems for steganographically encoding a file which is in a page description language (PDL) such as PostScript. Aspects of the present invention can be used to: i) encode a PDL file and generate an encoded PDL file; and ii) provide an “interpreter” which generates raster images from a PDL file. Portions of the raster images can be steganographically encoded. Encoded raster images can be printed or the raster images can be combined into a new PDL file.
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