Method of using road signs to augment global positioning...

Details Method of using road signs to augment global positioning... Method of using road signs to augment global positioning...

2011-04-19

2011-04-19

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a satellite

Reexamination Certificate

active

07928905

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.

REFERENCES:
patent: 2007/0055441 (2007-03-01), Retterath et al.
patent: 2007/0154067 (2007-07-01), Laumeyer et al.

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