Utilizing of brush stroking techniques in the generation of comp

Details Utilizing of brush stroking techniques in the generation of comp Utilizing of brush stroking techniques in the generation of comp

1998-07-10

2000-10-24

Nguyen, Phu

Computer graphics processing and selective visual display system

Computer graphics processing

Shape generating

G06F 1500

Patent

active

061375004

ABSTRACT:
A form of "brushing" an computer graphic image is disclosed. The method includes brushing a simulated brush stroke along a path in a computer graphics image by converting the path to a series of corresponding line segments; determining a current convex brush edge of the path; determining a series of substantially equally spaced points along the convex edge; determining corresponding parametric points along the path; and utilising the parametric points to place brush template structures in the computer graphics image. In a first refinement, the opacity channel is combined such that the maximum of a current brush template opacity value and a current computer graphic image opacity channel value becomes the new current computer graphic image opacity channel value. In a second refinement, the opacity channel is combined such that the minimum of a current brush template opacity value and a current computer graphic image opacity channel value becomes the new current computer graphic image opacity channel value. In a third refinement, the computer graphic image further comprises a footprint channel which is set when each pixel is composited and the opacity channel is only composited with the computer graphic image opacity channel when the footprint channel is not set.

REFERENCES:
patent: 4455609 (1984-06-01), Inamura et al.
patent: 5247611 (1993-09-01), Norden-Paul et al.
patent: 6020898 (2000-02-01), Saito et al.

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