Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-05-30
1990-05-29
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358298, 358456, 358462, 358467, H04N 146, H04N 140
Patent
active
049300075
ABSTRACT:
A color image processing apparatus processes an image, signal having a plurality of color components, by black signal synthesis and undercolor removal to remove a non-color component such as black from the color component signal. The non-color component is utilized to discriminate if an area of a color image represented by the color component signal is a high resolution area represented, for example, by characters, or is a gray level area. If the area is a high resolution area, the color components of the color component signal and the non-color component are processed in accordance with respective constant threshold memory data. However, if the color component signal is discriminated as being a gray level area, the respective color components and the non-color component are processed in accordance with respective dither memory data. Accordingly, faithful and clear images may be reproduced in both high resolution and gray level areas with faithful color balance. A method performed in accordance with the color imaging processing apparatus described above is also disclosed.
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Kouzato Yasuo
Masuda Yukio
Sugiura Susumu
Canon Kabushiki Kaisha
Groody James J.
Svihla Randall S.
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