Image processing apparatus for determining copying-inhibited document
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United States of America Patent
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Jul 14, 1998
Grant Date -
N/A
app pub date -
Aug 31, 1995
filing date -
Aug 31, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided by the present invention an image processing apparatus which accurately determines a copying-inhibited document prepared by using paper with a copying-inhibited pattern printed or copied on the entire surface thereof by checking for each pixel data constituting image data whether an object pixel has a black peak density coincident to that of a copying-inhibited document, whether a white area having a specified size exists at a peripheral area at a distance therefrom, whether the object pixel is a screen tone graph or character area pixel, or an illegal area pixel or not.
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