Method of using road signs to augment Global Positioning System (GPS) coordinate data for calculating a current position of a personal navigation device
First Claim
1. A method of using road signs to augment Global Positioning System (GPS) coordinate data for calculating a current position of a personal navigation device, the method comprising:
- obtaining recent GPS coordinate data with the personal navigation device;
obtaining an image from a camera of the personal navigation device, the image showing areas surrounding a road on which the personal navigation device is traveling;
recognizing a sign in the image by performing image processing on the image; and
using a known position of the sign to augment the recent GPS coordinate data in order to more precisely determine an actual location of the personal navigation device.
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Accused Products
Abstract
A method of using road signs to augment Global Positioning System (GPS) coordinate data for calculating a current position of a personal navigation device includes obtaining recent GPS coordinate data with the personal navigation device, obtaining an image from a camera of the personal navigation device, the image showing areas surrounding a road on which the personal navigation device is traveling, recognizing a sign in the image by performing image processing on the image, and using a known position of the sign to augment the recent GPS coordinate data in order to more precisely determine an actual location of the personal navigation device.
65 Citations
20 Claims
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1. A method of using road signs to augment Global Positioning System (GPS) coordinate data for calculating a current position of a personal navigation device, the method comprising:
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obtaining recent GPS coordinate data with the personal navigation device; obtaining an image from a camera of the personal navigation device, the image showing areas surrounding a road on which the personal navigation device is traveling; recognizing a sign in the image by performing image processing on the image; and using a known position of the sign to augment the recent GPS coordinate data in order to more precisely determine an actual location of the personal navigation device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A personal navigation device calculating a current position of the personal navigation device using road signs to augment received Global Positioning System (GPS) coordinate data, the personal navigation device comprising:
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a GPS receiver for obtaining recent GPS coordinate data; a camera for obtaining an image showing areas surrounding a road on which the personal navigation device is traveling; and a processor for recognizing a sign in the image by performing image processing on the image, and using a known position of the sign to augment the recent GPS coordinate data in order to more precisely determine an actual location of the personal navigation device. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification