Visible-invisible background prompter
US6616281B1 · kind B1 · utility
15Cited by
5References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 7, 2002 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Aug 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video signal is generated representative of a background scene, such as a weather map, which provides an outline of all the detail in the map. This outline detail is made visible to a foreground subject by projecting it onto a white screen behind the subject in a selected color such as green. The projector is selectively inhibited so as to prevent the background detail from projecting onto the foreground subject. The white screen and the green detail lines are removed and replaced by the background scene by an image compositing process. Prompts are visible to the foreground subject, but not visible to a home viewing audience.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.