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Wheelchair detection using stereo vision

  • US 7,043,084 B2
  • Filed: 07/30/2002
  • Issued: 05/09/2006
  • Est. Priority Date: 07/30/2002
  • Status: Expired due to Fees
First Claim
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1. A method for classifying an object in a scene comprising:

  • acquiring a set of stereo images of the object in the scene with a set of stereo cameras;

    segmenting the object from the background using detected edges of the stereo images;

    generating a 3D reconstruction of the object from the detected edges of the stereo images in which the reconstruction further comprises;

    fitting a vertical plane to the 3D reconstruction;

    measuring a goodness-of-fit of the plane to the 3D reconstruction;

    taking a ratio of the goodness-of-fit over the height, where the height is a difference between a topmost point of the 3D reconstruction and a ground plane; and

    testing the ratio to classify the object as an ambulatory person or a wheelchair user; and

    performing tests on height and 3D shape of the 3D reconstruction to classify the object as an ambulatory person or a wheelchair user.

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