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Location of image capture device and object features in a captured image

  • US 9,324,003 B2
  • Filed: 03/14/2013
  • Issued: 04/26/2016
  • Est. Priority Date: 09/14/2009
  • Status: Active Grant
First Claim
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1. A method for matching a region on an object of interest with a geolocation in a coordinate system, said method comprising:

  • capturing an image of a region of an object of interest using an image capture device at a first location;

    processing said image to detect a located feature using a feature detection algorithm, wherein said feature detection algorithm is configured to detect said located feature at a two-dimension pixel coordinate in said image for further processing;

    further processing said located feature to derive a first feature descriptor using a feature descriptor extraction algorithm, wherein said feature descriptor extraction algorithm is configured to resample an area in said image around said located feature and derive a compact representation that is usable to identify said located feature and to distinguish said located feature from other features in said image;

    storing said first feature descriptor in a memory;

    searching a database of feature descriptors having geolocation information associated with the feature descriptors, for a match to said first feature descriptor;

    determining by said image capture device a geographic position of said image capture device based upon the geolocation information associated with said first feature descriptor; and

    making said geolocation information available for access.

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