Method and apparatus for generating anti-aliased vectors, arcs a

Details Method and apparatus for generating anti-aliased vectors, arcs a Method and apparatus for generating anti-aliased vectors, arcs a

1986-04-14

1993-12-28

Herndon, H. A.

G06P 1562

Patent

active

052747549

ABSTRACT:
A method and apparatus for anti-aliasing vectors, arcs and circles comprising a plurality of pixels on a video display. The distance, d, of each pixel from the centerline of a curve is computed using a plurality of linearly dependent equations. The intensity of each pixel is set as a function of the magnitude of the distance, d, of the pixel from the centerline of the curve. In some cases, the distance, d, is compared with ranges of distances and the intensity of the pixel set according to the range within which the pixel is located. In other cases, the intensity of the pixel is simply inversely proportional to its distance, d, from the centerline.

REFERENCES:
patent: 4262290 (1981-04-01), Vallins
patent: 4586037 (1986-04-01), Rosener et al.
patent: 4593372 (1986-06-01), Bandai et al.
patent: 4601002 (1986-07-01), Rosenthal
patent: 4698768 (1987-10-01), Thuy et al.
Filtering Edges for Gray-Scale Displays, S. Gupta, R. F. Sproull, Computer Graphics, vol. 15, No. 3, Aug. 1981, pp. 1-5.
Fundamentals of Interactive Computer Graphics, J. D. Foley and A. VanDam, Addison-Wesley 1982; pp. 433-435.

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