×

Implementing compositing operations on images

  • US 7,965,299 B2
  • Filed: 10/20/2006
  • Issued: 06/21/2011
  • Est. Priority Date: 10/31/2005
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of compositing graphic elements, the method being performed in a pixel-based renderer, said method comprising the steps of:

  • receiving by the renderer a first graphic element having a first colour and a first opacity and a second graphic element having a second colour and a second opacity;

    determining by the renderer a blend output of a blend function dependent on the first colour and the second colour, wherein the blend function uses the second colour to modify the first colour to determine the blend output; and

    determining by the renderer a resultant colour and a resultant opacity of a compositing operation on the first and second graphic elements, the resultant opacity being equal to the first opacity and the resultant colour having contributions from the first colour and the second colour while being dependent only on the blend output to provide the contribution of the second colour, the resultant colour also being independent of the first opacity.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×