Method and means for texture display in raster scanned color gra

Details Method and means for texture display in raster scanned color gra Method and means for texture display in raster scanned color gra

1978-12-18

1980-09-30

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

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

340701, 340744, 340798, 358903, G06F 3153

Patent

active

042258618

ABSTRACT:
A method and means for creating the display illusion of "roughness" or "texture" in color patterns suitable for an raster scanned display surface by assigning different color values to pels (picture elements) in adjacent positions and then replicating the patterns automatically using the recurrent and sequential accessing of a concordance table. The real color of each pel of a textured pattern is a joint function of a color number stored in a refresh buffer driving the display surface for any given display matrix array pel position and the value of a predetermined subset of address bits which describe that pel position. The use of preselected pel position address bits for regulating texture is shown as applied to video lookup tables and refresh buffers as a singlelevel control and additionally to two or more video lookup tables for achieving a pattern hierarchy.

REFERENCES:
patent: 3729580 (1973-04-01), Schneider
patent: 3843959 (1974-10-01), Owaki et al.
patent: 3854130 (1974-12-01), Ligocki
patent: 3961365 (1976-06-01), Payne et al.
patent: 3976982 (1976-08-01), Eiselen
patent: 4146876 (1979-03-01), Arellano et al.
patent: 4149164 (1979-04-01), Reins et al.
patent: 4149184 (1979-04-01), Giddings et al.
Giddings & Langdon, "Interactive Color Selection Apparatus for Color Graphics Displays;" IBM Tech. Disc. Bul., vol. 19, No. 11, Apr. 1977, pp. 4400, 4401.

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