Machine vision system calibration using inaccurate calibration targets
US10032273B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2013 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Jun 15, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Described are methods, systems, and apparatus, including computer program products for calibrating machine vision systems. A system includes: one or more cameras; a motion rendering device; and a calibration module. The calibration module is configured to acquire, from a first camera of the one or more cameras, a plurality of images of a calibration target comprising a calibration pattern that provides a plurality of calibration features; extract calibration features of the plurality of calibration features from the plurality of images, wherein physical positions of the plurality of calibration features are in a calibration target length unit associated with the calibration target; determine a ratio between the calibration target length unit and a motion rendering device length unit associated with the motion rendering device; and provide a first calibration for the first camera based on the ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.