×

Video/vision based access control method and system for parking occupancy determination, which is robust against abrupt camera field of view changes

  • US 9,716,837 B2
  • Filed: 09/16/2013
  • Issued: 07/25/2017
  • Est. Priority Date: 09/16/2013
  • Status: Active Grant
First Claim
Patent Images

1. A method for parking occupancy determination, said method comprising:

  • measuring changes in a field of view using template matching between templates learned from at least one original scene and templates learned from at least one current scene with motion removed, wherein said at least current scene with motion removed comprises a motion-removed current scene;

    employing said changes measured in said field of view to adjust data indicative of at least one region of interest for vision-based processing thereof if said changes measured are above a pre-determined threshold so that an impact of said changes with respect to said field of view to performance is minimized; and

    applying diagnostics with respect to said field of view without compensation to assist in remotely repositioning a camera associated with said field of view back to said at least one original scene,wherein said templates comprise at least one M×

    N sub-image derived from said at least one original scene and said at least one current scene with said motion removed; and

    said template matching is based on a normalized cross-correlation value as a similarity metric, wherein at run-time each image template among said templates slides against said motion-removed current scene and a location is determined, which yields a highest normalized cross-correlation value, said normalized cross-correlation value comprising said highest normalized cross correlation value.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×