System for displaying shaded image of three-dimensional object

Details System for displaying shaded image of three-dimensional object System for displaying shaded image of three-dimensional object

1986-10-14

1990-07-24

Harkcom, Gary V.

Boots, shoes, and leggings

340729, G06F 1572

Patent

active

049439383

ABSTRACT:
A display system comprising: display apparatus; a first apparatus for producing a depth value signal and a normal direction signal for each of those display pixels, included in a two-dimensional graphic obtained when a three-dimensional graphic to be displayed is projected on a two-dimensional plane, among the pixels constituting a display screen on the display device, a second apparatus connected to the first apparatus and responsive to each of the depth value signals for producing a first reflection light intensity signal for each display pixel, a third apparatus connected with the first apparatus and responsive to each of the normal direction signals produced from the first apparatus for producing a second reflection light intensity signal for each display pixel, and a fourth apparatus, connected to the display device, the second apparatus and third apparatus and responsive to the first and second reflection light intensity signals for each display pixel for controlling a reflection light intensity signal for each of the plurality of display pixels to be sent to said display device.

REFERENCES:
patent: 3441789 (1969-04-01), Harrison, III
patent: 3539860 (1970-11-01), Max et al.
patent: 4352105 (1982-09-01), Harney
patent: 4609917 (1986-09-01), Shen
patent: 4679041 (1987-07-01), Fetter et al.
patent: 4709231 (1987-11-01), Sakaibara et al.
J. D. Foly and A. Van Dam, "Fundamentals of Interactive Computer Graphics", Addison Wesely Publishing Company.

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