Image processing apparatus for processing respective image data

Details Image processing apparatus for processing respective image data Image processing apparatus for processing respective image data

1990-02-23

1992-07-21

Brinich, Stephen

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 80, H04N 146, G03F 308

Patent

active

051327880

ABSTRACT:
An image processing apparatus reads an original image by dividing it into pixels, processes respective image data obtained by the reading, and outputs an image signal corresponding to each pixel. The apparatus includes a selector for selecting minimum image data from image data of additive three primary colors obtained by reading a color image; a multiplying device for multiplying the minimum image data by either an under-color removal coefficient data or a black paint coefficient data supplied thereto and outputting under-color image data or black paint image data. An under-color removal calculator receives the image data of the additive three primary colors and the image data outputted from the multiplying device and generates under-color removal image data corresponding to the image data of the respective additive colors based on the under-color image data. A color correction masking device for receives the under-color removal image data from the under-color removal calculator and generates image data of subtractive colors based on masking coefficient data according to the respective additive colors. An image data selector receives the image data outputted from the multiplying device, the image data outputted from the color correction masking device, and one of the image data of the additive three primary colors so as to selectively output the respective image data.

REFERENCES:
patent: 4841362 (1989-06-01), Urabe et al.
patent: 4845550 (1989-07-01), Urabe et al.
patent: 4975769 (1990-12-01), Aizu et al.
patent: 4980758 (1990-12-01), Matsunawa et al.
patent: 4989079 (1991-01-01), Ito
patent: 4989080 (1991-01-01), Ito

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