Image processing apparatus, method, and storage medium that perform quantizing processing of image data for at least N colors
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United States of America Patent
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Jul 5, 2016
Grant Date -
Aug 7, 2014
app pub date -
Apr 3, 2014
filing date -
May 20, 2010
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Abstract
An apparatus includes an image processing circuit to perform quantizing processing of image data, which has a plurality of rasters, each of which is formed with a plurality of pixels, by an error diffusion method, to generate print data. The image processing circuit is capable of performing quantizing processing of image data for N colors, and performs the quantizing processing multiple times in image processing of image data for colors more than N colors. In a case when the image processing circuit performs image processing for image data for colors more than the N colors, the image processing circuit repeatedly performs at least first image processing for performing image processing of image data of a first color group and second image processing for performing image processing of image data of a second color group for each band.
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