Computer image generation method for determination of total pixe

Details Computer image generation method for determination of total pixe Computer image generation method for determination of total pixe

1990-12-20

1993-12-07

Harkcom, Gary V.

G06F 1566

Patent

active

052689964

ABSTRACT:
A method for determining the illumination of an illuminator at a selected point P in an image volume to be projected on an image screen surface by a computerized image generator, operates by: decomposing the illuminator into at least one of spherical, beam and cylindrical sources; determining a direction of incidence of the light from each source at point P in the image volume; determining the extent of the source and the attenuation of illumination with distance from that source; then determining a set of color light intensities at point P in the image volume due to the light from the particular source; and translating the incidence direction and color intensities from point P to a displayable incidence direction and a displayable set of color illumination intensities at a corresponding projection location on the image screen surface.

REFERENCES:
patent: 4348184 (1982-09-01), Moore
patent: 4709231 (1987-11-01), Sakaibara et al.
patent: 4819192 (1989-04-01), Kuragano et al.
patent: 4928250 (1990-05-01), Greenberg et al.
patent: 4943938 (1990-07-01), Aoshima et al.
"Principles of Interactive Computer Graphics" by William M. Newman, 2nd Edition, 1979. pp. 390, 391, 392, 393, 934.
"Fundamentals of Interactive Computer Graphics". J. D. Foley and A. Van Dam, Jul. 1984, pp. 550-551, 575-590.

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