Bitmapped based trapping methods, apparatus and system by modifying non-black halftone pixel bitmap plane using estimated continuous tone value
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United States of America Patent
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May 7, 2013
Grant Date -
Mar 3, 2011
app pub date -
Aug 27, 2009
filing date -
Aug 27, 2009
priority date (Note) -
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Abstract
Provided are bitmap based trapping methods, apparatus and systems. According to one exemplary method, black trapping color image data is performed by estimating the continuous tone values associated with non-black pixels near a qualified black pixel and subsequently, the estimated continuous tone values are halftoned at the qualified black pixel locations and ORed with the original bitmap data.
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