Projection image area detecting device that generates marker images
US8870386B2 · kind B2 · utility
4Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2010 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Aug 4, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30204
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A projection image area detecting device includes a projection image area detecting unit configured to detect marker image areas in a photographed image that is obtained by photographing a projection image area including a projection image. The marker image areas include marker images that are used for identifying four corners of the projection image area. The projection image area detecting unit detects the marker image areas by identifying a color included in the marker image areas that continues to change as time passes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.