Color diamond chroma keying
US6751347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 18, 2001 |
| Grant date | Jun 15, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N9/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A process of defining a color volume for use in a process of color keying, in which a foreground image (405) is composited against a background image (407). The foreground image (405) contains regions of a background color (723). The user defines diamond shaped areas (611, 621) in PbPr color dimensions, and luminance ranges (612, 622). Tolerance and softness volumes (613, 623) are defined in this way, and a transformation is defined for each. Foreground pixels are processed (602) to determine a background, foreground, or softness condition for a matte (406). Softness represents a partial mix of foreground and background. The mix level is calculated by re-centering (1201) the softness volume, and processing (1206) with an optional sharpness parameter (706).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.