Method and system for the determination of object positions in a volume
US8086026B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 27, 2008 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Oct 27, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30204
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method or a system embodiment determines positional information about a moveable object to which is affixed a pattern of stripes having reference lines. A method determines image lines of stripe images of each stripe within at least two video frames, uses the image lines to prescribe planes having lines of intersection, and determines a transformation mapping reference lines to lines of intersection. Position information about the object may be derived from the transformation. A system embodiment comprises a pattern of stripes in a known fixed relationship to an object, reference lines characterizing the stripes, two or more cameras at known locations, a digital computer adapted to receive video frames from the pixel arrays of the cameras, and a program stored in the computer's memory. The program performs some or all of the method. When there are two or more moveable objects, an embodiment may further determine the position information about a first object to be transformed to a local coordinate system fixed with respect to a second object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.