The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 25, 2004
Filed:
Feb. 12, 2001
Applicant:
Inventor:
Yu-Ling Chen, Epping, AU;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G09G 5/02 ;
U.S. Cl.
CPC ...
G09G 5/02 ;
Abstract
A compositing system ( ) that comprises an optimized alpha-channel compositing module ( ) is disclosed. The compositing system ( ) optimizes the range correction in the alpha-channel compositing module ( ) by using a constant divider ( ) and delaying the correction of an alpha value until after the summation of the alpha values from all contributing regions. Uncorrected opacity values are used to index a look-up table in order to reduce the data processing path to a multiplier ( ) for processing after premultiplication of a color values from all contributing regions.