Using a region restricted cleanup signal to bridge a signal level mismatch between a blue screen and an adjoining garbage matte
US8063991B2 · kind B2 · utility
0Cited by
5References
14Claims
0Family size
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Key dates
| Filing date | Mar 26, 2007 |
| Grant date | Nov 22, 2011 |
| Priority date | — |
| Expiry date | Jun 21, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A visible luminance step in a background scene, caused by a signal level mismatch between a matte signal level and a blue backing signal level, is significantly reduced by a soft edge transition region that raises the blue backing signal level up to the signal level of a garbage matte by using a cleanup signal restricted to the transition region. The soft edge formed by cleanup does not make subjects transparent, and actors may enter this zone with little loss of image quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.