Method and apparatus for generating anti-aliased lines on a vide

Details Method and apparatus for generating anti-aliased lines on a vide Method and apparatus for generating anti-aliased lines on a vide

1990-05-24

1993-09-07

Harkcom, Gary V.

395141, G06F 1562

Patent

active

052436950

ABSTRACT:
Aliasing on a video display resulting from digital sampling and appearing as jagged lines and crawling movement is eliminated by controlling the intensity of video display pixels as a function of distance from the ideal line location. Intensity values are stored in an intensity lookup table as a function of two values. For the middle portion of a line, the two values are the shorter of the distance from a pixel in either the x-direction or y-direction and the smaller of the slope with respect to the x-axis or the y-axis. For line end points, the two values are the distances of the pixel from the end point in the x-direction and the y-direction.

REFERENCES:
patent: 4873515 (1989-10-01), Dickson et al.
patent: 4908780 (1990-03-01), Priem et al.
patent: 4918626 (1990-04-01), Watkins et al.

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