Method and apparatus for improved color to monochrome conversion

Details Method and apparatus for improved color to monochrome conversion Method and apparatus for improved color to monochrome conversion

1991-06-17

1995-03-21

Weldon, Ulysses

Computer graphics processing and selective visual display system

Display peripheral interface input device

Light pen for fluid matrix display panel

345114, G09G 300

Patent

active

054000530

ABSTRACT:
A method and apparatus for improving the quality of a color-to-gray scale conversion is disclosed. A table is generated providing a visually correct conversion of all possible background/foreground colors. This table is then stored. In operation, after the attribute byte describing the foreground and background colors is retrieved from memory, it is used to access the stored conversion table, wherein its gray scale equivalent is stored. The stored equivalent is then used to generate the gray scale LCD display. In other embodiments, multiple copies of the table are stored, making multi-frame operations very efficient in operation.

REFERENCES:
patent: 4688031 (1987-08-01), Haggerty
patent: 4779083 (1988-10-01), Ishii et al.
patent: 4992862 (1991-02-01), Gaber
patent: 5016097 (1991-05-01), Shimano

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