Facsimile and static presentation processing – Natural color facsimile – Specific image-processing circuitry
Reexamination Certificate
2006-08-08
2006-08-08
Wallerson, Mark (Department: 2626)
Facsimile and static presentation processing
Natural color facsimile
Specific image-processing circuitry
C358S519000, C358S518000, C358S534000, C358S525000, C358S530000, C358S523000, C382S167000, C347S131000, C345S596000, C345S089000
Reexamination Certificate
active
07088479
ABSTRACT:
An image processing apparatus, which performs color conversion for input tone data in an RGB color space to obtain tone data for a CMY color space, and which performs halftone processing to convert the tone data in the CMY color space to image reproduction data, is characterized in that a gamma characteristic A for an output density for a tone in the RGB color space is identical to a gamma characteristic B for an output density for a tone in the CMY color space in the halftone processing. In accordance with the invention, for the color conversion, even when the tone data for the RGB color space between the grid points of a color conversion table is obtained by interpolating the tone data for the CMY color space, the halftone process is performed for the RGB tone data in accordance with the same gamma characteristic B. Thus, image reproduction data can be obtained that provide the same output density as the output density allocated for the tone data of the RGB color space. Therefore, when the image reproduction data are employed for printing, the colors of an image can be accurately reproduced, as designed, and a high quality image can be printed.
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Japanese Abstract No. 08032828, dated Feb. 2, 1996.
Menberu Beniyam
Seiko Epson Corporation
Wallerson Mark
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