Computer graphics processing and selective visual display system – Computer graphics processing – Animation
Reexamination Certificate
2007-01-29
2010-06-29
Nguyen, Phu (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Animation
C345S557000, C345S582000, C345S653000, C345S679000, C715S861000, C715S863000
Reexamination Certificate
active
07746344
ABSTRACT:
A renderer for performing stroke-based rendering determines whether two given overlapping strokes depict an occlusion in a three-dimensional scene. The renderer may then use this information to determine whether to apply an occlusion constraint between the strokes when rendering an image or a frame from an animation. In one implementation, the renderer determines whether the two strokes together depict a single view patch of surface in the scene (i.e., a single portion of three-dimensional surface in the scene as seen from the rendering viewpoint). The renderer builds an image-space patch of surface defined from the union of the two overlapping strokes and then determines whether there exists a single three-dimensional view patch of surface that projects onto the image-space patch and that contains both strokes' three-dimensional anchor points. Which stroke occludes the other can be determined by the relative three-dimensional depth of the strokes' anchor points from the rendering viewpoint.
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Agrawal Amitabh
Grabli Stephane
Kalnins Robert
LeZotte Nathan
Auryn Inc.
Fenwick & West LLP
Nguyen Phu
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