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System and process for detecting, tracking and counting human objects of interest

  • US 8,472,672 B2
  • Filed: 07/27/2012
  • Issued: 06/25/2013
  • Est. Priority Date: 07/03/2007
  • Status: Active Grant
First Claim
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1. A method of identifying, tracking, and counting objects of interest based upon at least one pair of stereo image frames taken by at least one image capturing device, comprising the steps of:

  • obtaining said at least one pair of stereo image frames and converting each said stereo image frame to a rectified image frame using calibration data obtained from said at least one image capturing device;

    identifying the presence or absence of said objects of interest and comparing each of said objects of interest to existing tracks comprising previously identified objects of interest, wherein the identifying step includes the following steps;

    a first component detection step wherein connected areas in said depth image satisfying a predefined connectivity property are labeled as components;

    a second object detection step wherein local maxima detections are computed for each said component; and

    merging said local maxima detections closer than a specified merging distance to each other; and

    for each said presence of an object of interest, adding said object of interest to one of said existing tracks if said object of interest matches said one existing track, or creating a new track comprising said object of interest if said object of interest does not match any of said existing tracks.

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