Gamma corrected anti-aliased graphic display apparatus

Details Gamma corrected anti-aliased graphic display apparatus Gamma corrected anti-aliased graphic display apparatus

1986-05-05

1989-02-28

Caldwell, Sr., John W.

Communications: electrical

Land vehicle alarms or indicators

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

340728, 340703, 340747, G09G 114

Patent

active

048089842

ABSTRACT:
A raster scan display system of the type which includes an anti-aliasing circuit for controlling the pixel brightness to remove the stair-step effect common to raster scan displays, wherein the improvement comprises gamma correction means supplied with the anti-aliased display data for correcting for non-linearity in the relationship between the pixel intensity data and the actual intensity of the corresponding pixel of the raster scan display.

REFERENCES:
patent: 4237457 (1980-12-01), Houldsworth
patent: 4262290 (1986-04-01), Vallins
patent: 4470042 (1984-09-01), Barnich et al.
patent: 4482893 (1984-11-01), Edelson
patent: 4509043 (1985-04-01), Mossaides
patent: 4586037 (1986-04-01), Rosener et al.
patent: 4591844 (1986-05-01), Hickin et al.
patent: 4677431 (1987-06-01), Lee
IBM Technical Disclosure Bulletin "Anti-aliasing Video Lookup Table" vol. 27, No. 10B Mar. 1985.
Pixel Phasing Smoothes Out Jagged Lines (Anti-Aliasing System For CRTs Uses Four Extra Bit Planes), by David Oakley, Michael E. Jones, Don Parsons, and Greg Burke, Megatek Corp, San Diego, California (Electronics/June 28, 1984).
Jag-Free Images On Raster Displays, by Akira Fujimoto and Kansei Iwata, Graphics Computer Corporation (IEEE Computer Graphics, Dec. 1983).
A High-Speed Algorithm FoOr Generating Anti-Aliased Lines, by R. L. Ketcham of the Mitre Corporation, Bedford, MA (S(D 85 Digest).

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