Computer graphics processing and selective visual display system – Computer graphics processing – Attributes
Reexamination Certificate
2007-01-23
2007-01-23
Tung, Kee M. (Department: 2628)
Computer graphics processing and selective visual display system
Computer graphics processing
Attributes
C345S561000, C345S593000, C345S611000, C345S620000, C345S629000, C345S634000, C382S260000
Reexamination Certificate
active
10402724
ABSTRACT:
A method of performing a blending operation between a first pixel having a first pixel alpha value and a first pixel color data value and a second pixel having a second pixel alpha value and a second pixel color data value using a pre-defined set of logical operations and an associated set of pre-computed constant that includes calculating a first pixel blending factor and a second pixel blending factor based upon a selected Porter-Duff compositing equation, the first pixel alpha value, and the second pixel alpha value, such that there are no decisions to be made in an innermost calculation loop.
REFERENCES:
patent: 2002/0015039 (2002-02-01), Moore
Baldwin, Richard; “Java 2D Graphics, The Composite Interface and Transparency”; Java Programming Lecture Notes #320, Apr. 24, 2000; http://www.developer.com/tech/article.php/626361.
“Class AlphaComposite”; Java 2 Platform Std. Ed. v1.4.2; date unknown http://java.sun.com/j2se/1.4.2/docs/api/java/awt/AlphaComposite.html.
“Multimedia Programming, Lecture 4, Introduction to Java 2D”; date unknownhttp://scms.rgu.ac.uk/staff/dc/mmp/lecture4.html.
Zukowski, John; “Magic with Merlin: Porter-Duff Rules!”; Sep. 1, 2001; http://www-106.ibm.com/developworks/java/library/j-mer0918.
Baldwin, R.; “Java 2D Graphics, The Composite Interface and Transparency”; Java Programming Lecture Notes #320, Apr. 24, 2000; http://www.developer.com/tech/article.php/626351.
Thomas Porter and Tom Duff, “Compositing Digital Images” Computer Graphics, vol. 18, No. 3, Jul. 1984. pp. 253-259.
Caschera Antonio
Dorsey & Whitney LLP
Sun Microsystems Inc.
Tung Kee M.
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