Distance information acquisition apparatus or system, pattern projector, and distance information acquisition method
US6739516B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 20, 2002 |
| Grant date | May 25, 2004 |
| Priority date | — |
| Expiry date | Aug 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/2509
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A distance information acquisition apparatus uses a pattern projector to project a pattern onto an imaging object as a ranging object and obtains distance information from an image captured by an image capturing apparatus. The pattern is formed by combining sub-patterns, each sub-pattern comprising at least three types of pattern segments having optically identifiable characteristics. A computer determines which pattern segment in a captured image belongs to which sub-pattern in the pattern based on optical characteristics and position coordinates of that pattern segment in the captured image. A specification result is used to find distance information associated with the imaging object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.