Method and apparatus for color conversion

Details Method and apparatus for color conversion Method and apparatus for color conversion

1989-09-13

1992-06-16

Oberley, Alvin E.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340701, 340728, G09G 116, G09G 106

Patent

active

051227843

ABSTRACT:
A method and an apparatus for color conversion of n-bit color data to m-bit color data (where n is greater than m). New color data bytes and original color data bytes are compared for a current pixel and a previous pixel immediately preceding the current pixel, so that any change in the original color data is reflected in the new color data. This is done by changing the current pixel when a match of the new color data bytes and a mismatch of the original color data bytes occurs. The invention is especially useful for maintaining contrast between text and background.

REFERENCES:
patent: 4704605 (1987-11-01), Edelson
patent: 4733230 (1988-03-01), Kurihara et al.
patent: 4739312 (1988-04-01), Oudshoorn et al.
patent: 4763283 (1988-08-01), Coutrot
patent: 4924413 (1990-05-01), Suwannukul
patent: 4977398 (1990-12-01), Pleva et al.
patent: 4980678 (1990-12-01), Zenda
A. A. Arismendi et al., "Color on Color Character Attribute Mapping Implementation for a Liquid Crystal Display", IBM Technical Disclosure Bulletin, vol. 29, No. 2, Jul. 1986, pp. 811-812.

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