Computer graphics processing and selective visual display system – Computer graphics processing – Graph generating
Patent
1995-07-21
1998-04-28
Nguyen, Phu K.
Computer graphics processing and selective visual display system
Computer graphics processing
Graph generating
345434, 345435, 345141, G06T 1100
Patent
active
057451214
ABSTRACT:
A system, method and language for compositing or creating images is disclosed. The images typically comprise a plurality of graphical elements each including color and opacity information, The system utilizes operators having the graphical elements as operands in which the operators combine the operands according to a function defined by the operators, the color information, and the opacity information, to produce new graphical elements. One part of the system includes interpreting the language by parsing and executing a sequence of statements and forming an expression tree the nodes of which comprise the graphical elements. Instructions are then derived from the tree. Another part permits the compositing of opaque graphical elements and associated clipping operations. Bounding box methods are used for locating active areas of graphical elements from the nodes. Manipulation of the expression tree is used to reduce the expected execution time of the compositing commands. An architecture is disclosed for implementing the system.
REFERENCES:
"Merging and Transformation of Raster Images for Cartoon Animation", Bruce A. Wallace-- Computer Graphics vol. 15, No. 3, Aug. 1981.
"Compositing Digital Images", Thomas Porter and Tom Duff -Computer Graphics vol. 18, No. 3 Jul. 1984.
"A Language for Bitmap Manipulation", Leo J. Guibas and Jorge Stolfi -ACM Transactions on Graphics, vol. 1, No. 3, Jul. 1982, pp. 191-214.
"A Model for Efficient and Flexible Image Computing", Michael A. Shantzis, Computer Graphics Proceedings, Annual Conference Series, 1994 p. 147.
Canon Information Systems Research Australia Pty Ltd
Canon Kabushiki Kaisha
Hong Stephen
Nguyen Phu K.
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