Calibrated sensor and method for calibrating same
US7133570B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Nov 7, 2006 |
| Priority date | — |
| Expiry date | May 11, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/80
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
For an optical sensor, a simple approach to obtain a mapping function that transforms sensor coordinates of a generic imaging system to coordinates of a virtual, projective camera. The sensor plane of this virtual camera is established using a planar calibration object and does not require known features on the object. Two in-plane motions are sufficient to establish the distortion-free virtual camera. The sensor plane of the virtual projective camera is used to calibrate all subsequent images obtained by the optical sensor. For a generic sensor, the present method is a simple approach to obtain a mapping function that transforms sensor measurements into a virtual sensor system. The virtual sensor system is established using a uniform bias. The virtual sensor system is used to calibrate all subsequent measurements obtained by the sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.