Information processing apparatus, image processing apparatus and method thereof, which create and use a halftone screen
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United States of America Patent
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Apr 3, 2012
Grant Date -
Apr 16, 2009
app pub date -
Oct 7, 2008
filing date -
Oct 16, 2007
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Abstract
A halftone screen which is applicable to a low-resolution electrophotographic printer is created. Hence, dot-lattice points arranged in a predetermined region are displaced using rotation processing, the predetermined region is partitioned into polygons each of which surrounds the dot-lattice point. Then, a threshold matrix used to grow a halftone dot, which is surrounded by each polygon, in a direction of the displacement is generated.
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