Image processing apparatus and image processing method for repro

Details Image processing apparatus and image processing method for repro Image processing apparatus and image processing method for repro

1992-01-28

1994-03-29

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358501, 358504, 358523, G03F 308

Patent

active

052990346

ABSTRACT:
An image processing apparatus having a first conversion section for converting image data of a target pixel in a multi-color image as an object to be processed into first color data corresponding to colors of the image data, a second conversion section for converting the first color data converted by the first conversion section into binary data, a first calculation section for calculating second color data having the same colors as those of the image data on the basis of a plurality of the binary data converted by the second conversion section, a second calculation section for calculating color errors between the image data and the second color data calculated by the first calculation section, a third calculation section for calculating weighting errors by multiplying the color errors calculated by the second calculation section with predetermined weighting coefficients, a storage section for storing the weighting errors calculated by the third calculation section, and a correction section for correcting the image data of the target pixel according to the weighting errors stored in the storage section.

REFERENCES:
patent: 4328515 (1982-05-01), Wellendorf
patent: 4654721 (1987-03-01), Goertzel
patent: 5070413 (1991-12-01), Sullivan et al.
patent: 5184213 (1993-02-01), Ishida
Floyd et al., "An Adaptive Algorithm for Spatial Greyscale", 1975, pp. 75-77.

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