System and method for position calibration of a spot of an optical sensor
US9124754B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2011 |
| Grant date | Sep 1, 2015 |
| Priority date | — |
| Expiry date | Jun 8, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/6044
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for position calibration of a spot of a known geometry of an optical sensor is disclosed. The method may include providing a position calibration patch on a sheet at a position which is known with respect to a reference position on the sheet, along a scan path of the spot of the optical sensor across the sheet. The patch may include at least two adjacent blocks of different colors. The method may also include obtaining a sampling of the position calibration patch using the optical sensor. The method may further include determining from the sampling a relative coverage of the spot over the color blocks of the position calibration patch, and based on the known geometry of the spot and on the determined relative coverage, determining the position of the spot of the sensor with respect to the reference position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.