Methods and systems for computing an alpha channel value
US9710879B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 8, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Nov 6, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/2628
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods and systems for computing an alpha channel value are provided. In one embodiment, a set of parameters is obtained based on an effect (transformation) to be applied to a source image. A value is also obtained that defines a uniform width of an area that borders at least one boundary of the transformed source image in the target image. For a target image pixel coordinate in the area, a corresponding source pixel coordinate is computed that is within another non-uniform area bordering the source image. An alpha channel value defining semi-transparency of a pixel associated with the target image pixel coordinate is computed as a function of a location of the corresponding source pixel coordinate in the another area bordering the source image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.