Image processor, image-processing method, and...

Details Image processor, image-processing method, and... Image processor, image-processing method, and...

2007-11-13

2011-11-22

Le, Brian (Department: 2624)

Image analysis

Color image processing

C382S167000, C382S252000, C382S274000, C382S275000

Reexamination Certificate

active

08064689

ABSTRACT:
An image processor has: a unit that executes a conversion process on input image data represented by pixels of M grayscales (M≧3), to convert the input data into output image data represented by sub-pixels of two grayscales; and a unit that outputs the output data, wherein the conversion process includes: a process to determine a filling pattern of sub-pixels corresponding to a pixel of interest of the input data according to a corrected grayscale value obtained by adding a correction value to a grayscale value of the pixel of interest; and the pattern includes a core pattern which forms a core of a dot and a growth pattern which grows a dot, the correction value includes a diffused error, and at least a part of the diffused error obtained by weighting an error of a pixel determined as the core pattern is not included in the correction value.

REFERENCES:
patent: 2002/0051233 (2002-05-01), Morimatsu
patent: 2003/0231348 (2003-12-01), Ishii et al.
patent: 2005/0135673 (2005-06-01), Mantell
patent: 2003348347 (2003-12-01), None

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