Collaborative pointing devices
US7193608B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 2003 |
| Grant date | Mar 20, 2007 |
| Priority date | — |
| Expiry date | Mar 8, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0386
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and system for determining a position of laser spots in an initial image due to a plurality of laser pointer, the method having the steps of acquiring a sequence of images from a camera directed at the initial image to produce acquired images thereof, each said acquired image comprising image elements forming a frame; assigning each of said laser pointers a unique transmission pattern; registering said code of each of said laser pointers during frame i with a processor; determining said laser spots in said frame i; registering the appearance of the laser spots of each of the laser pointers during frame i with a processor; assigning positional coordinates to each said located laser spots so as to produce a sequence of positional coordinates (xi,yi) corresponding to sequential positions of the laser spot in the initial image; whereby said laser spots appear in the captured images in a pattern corresponding to said unique transmission pattern and each of said laser pointers is uniquely identifiable and tracked.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.