Color signal processing apparatus with a signal interpolation fu

Details Color signal processing apparatus with a signal interpolation fu Color signal processing apparatus with a signal interpolation fu

1985-12-20

1987-06-09

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

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358 75, H04N 146

Patent

active

046724338

ABSTRACT:
In a color picture reproducing apparatus, a color light receiving element array has light receiving element which are arrayed in one line and have color separation filters. At least three light receiving elements are assigned for each pixel. The apparatus picks up color signals for each pixel, and reproduces a color picture for each pixel using these picked up color signals. The color signals, which are derived from the pixels of the array on which a portion of a color picture, such as an edge of a black character picture is imaged, inevitably contain errors arising from positional differences between the light receiving elements in one pixel. The errors deteriorate the quality of a reproduced picture. To prevent this, a color signal processing circuit is arranged to interpolate the color signals from adjacent pixels according to the positions of the light receiving elements in one pixel. A signal interpolating circuit for the signal interpolation may separately be provided. Alternatively, a color signal converting circuit may be arranged to perform the signal interpolating function.

REFERENCES:
patent: 4511989 (1985-04-01), Sakamoto
patent: 4591905 (1986-05-01), Noguchi
patent: 4602294 (1986-07-01), Yamada
patent: 4603348 (1986-07-01), Yamada
patent: 4623973 (1986-11-01), Hoffrichter
patent: 4626902 (1986-12-01), Yamada
1984 Image Electronics Society, Preprint of 12th National Meeting, No. 32 entitled "A Color Filter Array & Read Quality of a Sensor for a Color Facsimile"-no translation.

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