IMAGE-BASED INDOOR POSITION DETERMINATION
First Claim
Patent Images
1. A method comprising:
- extracting linear features from an image of an indoor portion of a building, said image captured by a camera at a mobile station;
determining a topological representation of said indoor portion based, at least in part, on positions or quantity of said linear features in said image;
selecting a stored topological representation from among a plurality of stored topological representations of particular areas of said building; and
comparing said topological representation to said selected stored topological representation of said building to determine a candidate position of said mobile station.
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Abstract
In one implementation, a method may comprise: determining a topological representation of an indoor portion of a building based, at least in part, on positions or number of lines in an image of the indoor portion of the building; and comparing the topological representation to one or more stored topological representations, for example in a digital map of the building, to determine a potential position of the indoor portion of the building.
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Citations
30 Claims
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1. A method comprising:
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extracting linear features from an image of an indoor portion of a building, said image captured by a camera at a mobile station; determining a topological representation of said indoor portion based, at least in part, on positions or quantity of said linear features in said image; selecting a stored topological representation from among a plurality of stored topological representations of particular areas of said building; and comparing said topological representation to said selected stored topological representation of said building to determine a candidate position of said mobile station. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus comprising:
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means for extracting linear features from an image of an indoor portion of a building, said image captured by a camera at a mobile station; means for determining a topological representation of said indoor portion based, at least in part, on positions or quantity of said linear features in said image; means for selecting a stored topological representation from among a plurality of stored topological representations of particular areas of said building; and means for comparing said topological representation to said selected stored topological representation of said building to determine a candidate position of said mobile station. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A mobile station comprising:
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a camera; and one or more processing units configured to; extract linear features from an image of an indoor portion of a building, said image captured by said camera at said mobile station; determine a topological representation of said indoor portion based, at least in part, on positions or quantity of said linear features in said image; select a stored topological representation from among a plurality of stored topological representations of particular areas of said building; and compare said topological representation to said selected stored topological representation of said building to determine a candidate position of said mobile station. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A non-transitory storage medium comprising machine-readable instructions stored thereon that are executable by a special purpose computing device to:
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extract linear features from an image of an indoor portion of a building, said image captured by a camera at a mobile station; determine a topological representation of said indoor portion based, at least in part, on positions or quantity of said linear features in said image; select a stored topological representation from among a plurality of stored topological representations of particular areas of said building; and compare said topological representation to said selected stored topological representation of said building to determine a candidate position of said mobile station.
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Specification