Systems and methods for correction of drift via global localization with a visual landmark
US7177737B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2003 |
| Grant date | Feb 13, 2007 |
| Priority date | — |
| Expiry date | Jan 3, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S901/50
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
The invention is related to methods and apparatus that use a visual sensor and dead reckoning sensors to process Simultaneous Localization and Mapping (SLAM). These techniques can be used in robot navigation. Advantageously, such visual techniques can be used to autonomously generate and update a map. Unlike with laser rangefinders, the visual techniques are economically practical in a wide range of applications and can be used in relatively dynamic environments, such as environments in which people move. One embodiment further advantageously uses multiple particles to maintain multiple hypotheses with respect to localization and mapping. Further advantageously, one embodiment maintains the particles in a relatively computationally-efficient manner, thereby permitting the SLAM processes to be performed in software using relatively inexpensive microprocessor-based computer systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.