Systems and methods for determining whether to add a landmark for visual simultaneous localization and mapping
First Claim
1. A method of determining whether to add a landmark to a map for navigation, the method comprising:
- autonomously navigating a mobile device using the map, and while navigating the mobile device, performing the following;
retrieving an image from a visual sensor;
comparing features from the image to a plurality of stored features;
generating a list of matching landmarks from the comparison;
filtering matching landmarks from the list based on reliability tests;
proceeding to a landmark creation process when there are no remaining matching landmarks in the list; and
providing match results to a simultaneous localization and mapping process for navigation of the mobile device when at least one matching landmark remains in the list;
wherein navigating, retrieving, comparing, generating, filtering, and proceeding are performed under the control of electronic hardware.
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Accused Products
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. Such visual techniques can be used to autonomously generate and update a map. Unlike with laser rangefinders, the visual techniques are 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 uses multiple particles to maintain multiple hypotheses with respect to localization and mapping. One embodiment maintains the particles, thereby permitting the SLAM processes to be performed in software using microprocessor-based computer systems.
120 Citations
12 Claims
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1. A method of determining whether to add a landmark to a map for navigation, the method comprising:
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autonomously navigating a mobile device using the map, and while navigating the mobile device, performing the following; retrieving an image from a visual sensor; comparing features from the image to a plurality of stored features; generating a list of matching landmarks from the comparison; filtering matching landmarks from the list based on reliability tests; proceeding to a landmark creation process when there are no remaining matching landmarks in the list; and providing match results to a simultaneous localization and mapping process for navigation of the mobile device when at least one matching landmark remains in the list; wherein navigating, retrieving, comparing, generating, filtering, and proceeding are performed under the control of electronic hardware. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus comprising:
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a computer program embodied in a tangible non-transitory computer-readable medium for determining whether to add a landmark to a map for navigation, the computer program comprising; program instructions configured to navigate a mobile device using the map; program instructions configured to retrieve an image from a visual sensor; program instructions configured to compare features from the image to a plurality of stored features; program instructions configured to generate a list of matching landmarks from the comparison; program instructions configured to filter matching landmarks from the list based on reliability tests; program instructions configured to proceed to a landmark creation process when there are no remaining matching landmarks in the list; and program instructions configured to provide match results to a simultaneous localization and mapping process for navigation of the mobile device when at least one matching landmark remains in the list and a processor configured to execute the program instructions of the computer program. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification