Method and system for laser intensity calibration in a three-dimensional multi-color laser scanning system
US7411688B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 2006 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Jul 31, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2509
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to an embodiment, a method and system for color calibration in a three-dimensional multi-color laser scanning system is disclosed. An object may be scanned with the scanning system, which scans the object with color laser heads. Laser intensities, corresponding to laser intensity values, may be received from the scanned object. Three different calibration targets are used to setup a field of view (FOV) calibration profile due to scanning position changes, a surface normal calibration profile due to surface normal direction changes, and a color reflectance calibration profile due to color reflectance changes. After compensating for laser power drift fluctuations, the laser intensity values may be further compensated for field of view scanning position changes and surface normal direction changes using the field of view calibration profile and surface normal calibration profile. Color values of each point scanned from the object may be calculated using compensated laser intensity values from the color reflectance profile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.