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Automatically determining field of view overlap among multiple cameras

  • US 8,913,791 B2
  • Filed: 03/28/2013
  • Issued: 12/16/2014
  • Est. Priority Date: 03/28/2013
  • Status: Expired due to Fees
First Claim
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1. A method for automatically determining field of view overlap among multiple cameras as a function of the temporal overlap of object tracks, the method comprising:

  • a processing unit determining a value of similarity for potential pairings of each of a plurality of object tracks determined in appearance information data of a field-of-view of a first camera with each of a plurality of object tracks determined in appearance information data of a field-of-view of a second camera, wherein said object tracks define movement of a tracked object over time through scene image data of respective ones of the first and second camera fields of view;

    the processing unit assigning into pairs each of the object tracks determined within the first camera field-of-view to ones each of the object tracks determined within the second camera field-of-view that each have a highest determined similarity value of the similarity values determined for their respective potential pairings;

    the processing unit determining that the assigned object track pairs correspond to overlapping portions of the fields-of-view of the first and second paired cameras if portions of each of the assigned object track pairs have a temporally overlapping period of time;

    the processing unit determining scene entry points on each of the tracks of the assigned object track pairs corresponding to the overlapping fields-of-view portions within their fields-of-view as locations of the object on the each of said tracks at a beginning of the temporally overlapping period of time;

    the processing unit determining scene exit points on each of tracks of the assigned object track pairs corresponding to the overlapping fields-of-view portions within their fields-of-view as locations of the object on the each of said tracks at an ending of the temporally overlapping period of time; and

    the processing unit defining boundary lines for the overlapping fields-of-view portions within their corresponding first and second camera fields-of-view as a function of the determined entry and exit points in their respective fields-of-view.

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