Landmark-based location of users
First Claim
1. A database of landmarks comprising, for each landmark in the database:
- topological information related to the landmark, wherein the topological information describes a larger and more geometrically simple structure than the landmark; and
user-noticeable features related to the landmark, wherein the user-noticeable features are prominent features or features that distinguish the landmark from similar landmarks in the database, and wherein further the user noticeable features are added to the database via manual annotation.
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Abstract
Humans identify location and directions based on visual cues, such as landmarks, rather than a precise coordinate grid. A database of landmarks can be used to determine the location of a user who can merely describe their location in the same manner they would to any human contact. The location of the user can be determined based on the landmarks described in the input, and the areas from which all of those landmarks are visible. Various databases can be used, including text-based and three-dimensional. Similarly, various mechanisms can be used to determine the user'"'"'s location, including hierarchical approaches, query optimization approaches, and visibility percentage approaches. Ultimately, the user'"'"'s location can be determined without the need for expensive, dedicated infrastructure, without compromising the user'"'"'s security, and without subjecting the user to system outages.
281 Citations
17 Claims
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1. A database of landmarks comprising, for each landmark in the database:
- topological information related to the landmark, wherein the topological information describes a larger and more geometrically simple structure than the landmark; and
user-noticeable features related to the landmark, wherein the user-noticeable features are prominent features or features that distinguish the landmark from similar landmarks in the database, and wherein further the user noticeable features are added to the database via manual annotation. - View Dependent Claims (2, 3)
- topological information related to the landmark, wherein the topological information describes a larger and more geometrically simple structure than the landmark; and
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4. A method for generating a database of landmarks comprising:
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deriving topological information from a series of overlapping images;
quantizing the topological information to represent a simple geometric structure;
increasing the size of the simple geometric structure to account for quantizing errors;
generating descriptions of user-noticeable features of the landmarks; and
linking the descriptions of the user-noticeable features to a corresponding quantized topological information. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A computer-readable medium having computer-executable instructions for generating a database of landmarks, the computer-executable instructions performing steps comprising:
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deriving topological information from a series of overlapping images;
quantizing the topological information to represent a simple geometric structure;
increasing the size of the simple geometric structure to account for quantizing errors;
generating descriptions of user-noticeable features of the landmarks; and
linking the descriptions of the user-noticeable features to a corresponding quantized topological information. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification