Apparatus and method for generating an anti-aliased display...

Details Apparatus and method for generating an anti-aliased display... Apparatus and method for generating an anti-aliased display...

G - Physics

09

G

G09G 5/00 (2006.01) G09G 5/20 (2006.01) G09G 5/395 (2006.01)

Patent

CA 2114146

Apparatus and method are disclosed for providing a halo (background region) around selected image data in an anti-aliased image processing system. The anti-aliased image processing system applies a distribution function (601) to an image (impulse) point so that the impulse point contributes to the display (101, 500) for a plurality of pixels. In order to provide a halo. a second or halo distribution function (602), extending beyond the anti-aliasing distribution function (601), is assigned to selected impulse points. For the current pixel, the pixel for which the display attributes are being determined, the contribution to the current pixel from neighboring pixels for both the anti-aliasing distribution function (601) and the halo distribution function (602) are determined separately. Then the contributions from each source are combined to determine the display characteristics of the currently activated pixel. The invention provides a technique for combining or prioritizing contributions from display regions including overlapping sets impulse points.

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