Patent Document ID: 6115050
Application ID: 09057327
Patent Status: 1

Claim One:
1. A method for reducing aliasing effects in an image, which image includes a representation of a portion of at least one visible polygon, the method comprising: determining at least one silhouette edge, wherein the silhouette edge is an edge of one of the visible polygons, which edge is not contiguous with any edge of any other visible polygons; and applying an anti-aliasing method to an area of the image, which area represents the determined silhouette edge, and for each silhouette edge, determining a line parallel to the silhouette edge, which line does not intersect the visible polygon which adjoins the silhouette edge; determining at least one anti-aliasing polygon having visual characteristics including opacity, such that the anti-aliasing polylons occupy a region between the line and the silhouette edge, the anti-aliasing polygons vary in opacity such that the anti-aliasing polygons are transparent at the line and exhibit the same level of opacity at the silhouette edge as the visible polygon which adjoins the silihouette edge, and the visual characteristics, other than opacity, of the anti-aliasing polygons are consistent with the visible polygon which adjoins the silhouette edge; and rendering the anti-aliasing polygons to the image.