Reducing the number of compositing operations performed in a...

Details Reducing the number of compositing operations performed in a... Reducing the number of compositing operations performed in a...

2005-11-01

2005-11-01

Bella, Matthew C. (Department: 2676)

Computer graphics processing and selective visual display system

Computer graphics processing

Attributes

C345S593000, C345S597000, C345S629000, C345S634000

Reexamination Certificate

active

06961067

ABSTRACT:
Apparatus20is disclosed for rendering an object-based image one pixel at a time in scanline order. The apparatus20comprises an optimisation module550for generating a set of compositing messages during a first pixel in a run of pixels between adjacent edges of one or two objects, and for generating a reduced set of compositing messages from the set during subsequent pixels in the run of pixels. The apparatus20further comprises a pixel compositing module700which in addition to compositing the first pixel in the run of pixels also stores a result or partial result of the compositing of the first pixel. The pixel compositing module700utilises the reduced set of compositing messages and the stored result or partial result to composite pixels in the run subsequent to the first pixel.

REFERENCES:
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patent: 6211859 (2001-04-01), Lin et al.
patent: 6411302 (2002-06-01), Chiraz
patent: 6531997 (2003-03-01), Gates et al.
patent: 6636216 (2003-10-01), Silverbrook et al.
patent: 2002/0015039 (2002-02-01), Moore
Thomas Porter, et al., “Compositing Digital Images”, Computer Graphics, pp. 253-259, vol. 18, No. 3, Jul. 1984.

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