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US 2004/0164993 A1Published application
Multisample dithering with shuffle tables
Assignee3Dlabs Inc., Ltd.
InventorsDale L. Kirkland, James L. Deming
Life of this patent
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Abstract
A system and method for generating random coverage masks for rendering images with transparent objects. The system uses shuffle tables for addresses of a pixel to index into a transparency table and to obtain a transparency mask, which is then ANDed with a coverage mask to obtain a new coverage mask.
Claims5
A method for using random coverage masks for reducing visual artifacts while rendering transparent objects, said method comprising the steps of:
- selecting a first index from a plurality of sources;
- receiving a second index from a first shuffle table based on said first index;
- obtaining a transparency mask from a transparency table based on said second index;
- and
- generating a new coverage mask by combining said transparent mask with a coverage mask.
2 more elements
A system for generating random coverage masks for use in rendering transparent objects, said system comprising:
- first index selecting means for selecting a first index from a plurality of sources;
- a shuffle table in communication with said first index selecting means, said shuffle table receiving said first index and outputting a second index;
- a transparency table in communication with said shuffle table, said transparency table receiving said second index and generating a transparency mask;
- and
- means for combining said transparency mask with a coverage mask and producing a random coverage mask, wherein said random coverage mask randomly enables samples of transparent objects.
2 more elements
Dependencies are inferred from the claim text.