Boots – shoes – and leggings
Patent
1982-04-12
1985-07-09
Springborn, Harvey E.
Boots, shoes, and leggings
364300, 340731, G06F 300, G06F 1500
Patent
active
045286426
ABSTRACT:
A method and apparatus is disclosed for independently displaying one of a plurality of images on a display and for superimposing the plurality of images onto one another to produce a composite image. One or more bit planes are selected to constitute a group (defined to be a "surface"), and one or more additional bit planes are selected to constitute another group. The number of groups corresponds to the number of images to be independently displayed. The priority of one group over the other is selected. This ensures that the image from the one group (surface) appears to be "in front of" the images from the other group (surface) on the display. In the case of a color terminal, the colors associated with each group are selected. A color map memory contains a plurality of brightness indices which determines image brightness. Associated with each index is one or more color indices. The bits associated with each pixel are used as an index to the color map memory by locating the corresponding color (or gray) indices. The associated brightness index is noted, and converted to an analog voltage for determination of image brightness. In response to the selection of the groups mentioned hereinabove, and the designation of priority among groups, the firmware recomputes the color map in the color map memory, that is, the color indices are set based upon the number of selected groups and the number of bit planes per group, and selected ones of the brightness indices are recomputed based on the designated priority among groups. Due to the ability of the present invention to select one or more bit planes to constitute a group, and due to the firmware's ability to recompute the color map, one or more images can be displayed on the CRT, either independently of one another, or superimposed upon one another to produce a composite image.
REFERENCES:
patent: Re31200 (1983-04-01), Sukonick et al.
patent: 3976982 (1976-08-01), Eiselen
patent: 4197590 (1980-04-01), Sukonick et al.
patent: 4354184 (1982-10-01), Woborschil
patent: 4366475 (1982-12-01), Kishi et al.
patent: 4420770 (1983-12-01), Rahman
Bouchard John H.
Hulse Robert S.
Jones Allston L.
Niessen William G.
Springborn Harvey E.
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