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Three-dimensional background removal for vision system

  • US 8,526,734 B2
  • Filed: 06/01/2011
  • Issued: 09/03/2013
  • Est. Priority Date: 06/01/2011
  • Status: Active Grant
First Claim
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1. A method for controlling a computer system, the method comprising:

  • acquiring video of a subject in front of a background;

    obtaining from the video a time-resolved sequence of depth maps, each depth map including an array of pixels;

    fitting a geometric model of the subject to a first depth map in the sequence;

    registering coordinates of the geometric model to a second depth map in the sequence;

    selecting from the second depth map a background section lacking coherent motion and located more than a threshold distance from the coordinates of the geometric model; and

    refitting the geometric model of the subject to the second depth map with the background section excluded, said acquiring obtaining, fitting, registering, selecting and refitting enacted within a computer vision system of the computer system.

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