Method and apparatus for improving full color images using proce

Details Method and apparatus for improving full color images using proce Method and apparatus for improving full color images using proce

1992-11-30

1994-07-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

358516, 358529, 358534, H04N 146

Patent

active

053314387

ABSTRACT:
A method for improving the quality of full-color images is disclosed. An original image is divided into a plurality of pixels. A neutral intensity value is determined for each pixel. A desired black-color intensity value is determined from the neutral intensity value. A printer-producible black value is determined from the desired value. The printer-producible black-color intensity value is used to rescale the original color intensity values of the pixels. The rescaled color intensity values are used to generate output color intensity values. The output image comprising the output color intensity values and the printer-producible black-color intensity value may then be converted to a continuously varying or halftone output image and output to an image output apparatus.

REFERENCES:
patent: 4275413 (1981-06-01), Sakamoto et al.
patent: 4651287 (1987-03-01), Tsao
patent: 4833546 (1989-05-01), Numakura
patent: 4868587 (1989-09-01), Loce et al.
patent: 4963990 (1990-10-01), Henderson et al.
patent: 5008742 (1991-04-01), Shigaki et al.

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