Method and apparatus for anti-aliasing scan conversion

Details Method and apparatus for anti-aliasing scan conversion Method and apparatus for anti-aliasing scan conversion

2002-12-24

2008-11-18

Tung, Kee M. (Department: 2628)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C382S260000, C382S279000

Reexamination Certificate

active

07453470

ABSTRACT:
Methods and apparatuses for anti-aliasing scan conversion. In one aspect of the invention, an exemplary method to scan convert an image on a data processing system includes: sampling the image in a first direction to generate first signals for points along a second line in a second direction using a closed form solution for a convolution integral with a first kernel; and weighting the first signals for the points according to a second kernel in the second direction to generate a second signal for a pixel. In one example according to this aspect, the closed form solution is tabulated in a look up table. After entries are looked up from the look up table according to the image along a first line in the first direction on a first point of the points, the entries are combined to generate one of the first signals for the first point.

REFERENCES:
patent: 5719595 (1998-02-01), Hoddie et al.
patent: 5848200 (1998-12-01), Butler et al.
patent: 6512837 (2003-01-01), Ahmed
patent: 2003/0077000 (2003-04-01), Blinn et al.
Tom Duff, “Polygon Scan Conversion By Exact Convolution”, Raster Imaging and Digital Typography, Proceedings of the International Conference, Ecole Polytechnique Federale Lausanne, Oct. 1989, pp. 154-168.

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