Facsimile and static presentation processing – Natural color facsimile – Color separation
Patent
1993-09-15
1995-07-04
Boudreau, Leo H.
Facsimile and static presentation processing
Natural color facsimile
Color separation
358523, H04N 146
Patent
active
054305594
ABSTRACT:
An image reading apparatus in accordance with the present invention reads a color image to separate the image into three primary colors by an image sensor and outputs image data corresponding to each of the colors. This image reading apparatus comprises a scanning device for making the image sensor relatively scan for a reference chart and an original, an A/D converter for converting an output of the image sensor into digital data corresponding to each of the primary colors, an operation device for evaluating correction data of each color from the output of the image sensor generated when the image sensor scans the reference chart, a multiplier for multiplying the digital data of each color by the correction data evaluated, an adder for adding a result of the multiplication and digital data before being multiplied, a shading correction circuit provided at a succeeding stage of the adder, and a line memory provided at a succeeding stage of the shading correction circuit.
REFERENCES:
patent: 3800078 (1974-03-01), Cochran et al.
patent: 4037249 (1977-07-01), Pugsley
patent: 4523229 (1985-06-01), Kanmoto
patent: 4554583 (1985-11-01), Saitoh et al.
patent: 4577218 (1986-03-01), Kurata
patent: 4679073 (1987-07-01), Hayashi
patent: 4731661 (1988-03-01), Nagano
patent: 4734762 (1988-03-01), Aoki et al.
patent: 4806780 (1989-02-01), Yamamoto et al.
patent: 4821099 (1989-04-01), Sakamoto
patent: 4833533 (1989-05-01), Augusti et al.
patent: 4839722 (1989-06-01), Barry et al.
patent: 4841360 (1989-06-01), Birgmeir
patent: 4926254 (1990-05-01), Nakatsuka et al.
patent: 4945405 (1990-07-01), Hirota
patent: 4987485 (1991-01-01), Hirota
patent: 5021877 (1991-06-01), Tsuchiya et al.
patent: 5053866 (1991-10-01), Johnson
patent: 5140413 (1992-08-01), Suzuki et al.
Boudreau Leo H.
Johns Andrew W.
Minolta Camera Kabushiki Kaisha
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