Optical 3D digitizer with enlarged no-ambiguity zone
US7274470B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 2004 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Jun 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/521
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical 3D digitizer with an enlarged non-ambiguity zone, comprising a structured light projector for projecting a fringe pattern over a target area, the fringe pattern having a shiftable position over the target area is disclosed. First and second cameras having overlapping measurement fields are directed toward the target area and positioned with respect to the projector to define distinct triangulation planes therewith. The second camera has a larger non-ambiguity depth than the first camera. A computer evaluates a same set of camera-projector related functions from images captured by the cameras including the projected pattern at shifted positions, builds low depth resolution and degenerated 3D models from the camera-projector related functions evaluated with respect to the second and first cameras respectively, determines chromatic texture from the images, and builds a complete textured 3D model from data corresponding between the low depth resolution and degenerated 3D models within a tolerance range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.