Global calibration for stereo vision probe
US8055466B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 2008 |
| Grant date | Nov 8, 2011 |
| Priority date | — |
| Expiry date | Aug 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for global calibration of a multi-view vision-based touch probe measurement system is provided which encompasses calibrating camera frame distortion errors as well as probe form errors. The only required features in the calibration images are the markers on the touch probe. The camera frame distortion calibration comprises a process that depends on a portable calibration jig and the touch probe, but that process is unaffected by probe form distortion errors in the touch probe and/or tip. The probe tip position calibration depends on applying the results of the camera, frame distortion calibration. When the same probe tip is used throughout the global calibration, the probe tip position calibration uses images from the set of images used by the camera frame distortion calibration. The global calibration method is particularly advantageous for low cost portable versions of multi-view vision-based touch probe measurement systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.