Line printing device and method performing color conversion and halftoning on image data subjected to correction based on correction vectors associated with a pixel row and reference color
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United States of America Patent
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Apr 30, 2013
Grant Date -
Sep 29, 2011
app pub date -
Mar 11, 2011
filing date -
Mar 24, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
For each of a plurality of reference colors located at prescribed coordinates in a first color space (e.g., the RGB color space), there are associated, on an individual pixel row basis, correction vectors indicating correction amounts in the first color space. For each pixel datum of image data of first tone values (e.g., 256 tone values) of the first color space prior to a color conversion process, a correction process is carried out on the basis of the correction vector that has been associated with the pixel row to which a given pixel belongs, the correction vector also being associated with the reference color of a location surrounding the coordinates that indicate the pixel data in the first color space. The color conversion process and the halftoning process are carried out on image data composed of the pixel data that has been subjected to the correction process.
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