Apparatus for detecting a pointer within a region of interest
US7232986B2 · kind B2 · utility
137Cited by
68References
44Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2004 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Aug 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/124
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for detecting a pointer within a region of interest includes at least one pair of imaging devices. The imaging devices have overlapping fields of view encompassing the region of interest. At least one light source provides illumination across the region of interest and is within the field of view of at least one of the imaging device. A filter is associated with the at least one imaging device whose field of view sees the light source. The filter blocks light projected by the light source to inhibit the imaging device from being blinded by the projected light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.