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Foreground detection

  • US 7,894,669 B2
  • Filed: 03/27/2007
  • Issued: 02/22/2011
  • Est. Priority Date: 12/18/2000
  • Status: Active Grant
First Claim
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1. A machine implemented method for producing virtual camera motion, comprising the steps of:

  • receiving a set of two or more images of a scene from two or more cameras not physically connected to each other;

    identifying foreground for at least a subset of said images of said scene, said step of identifying foreground includes determining a difference field for each of the two or more images with respect to a corresponding adjacent image in time for each image, combining the difference fields for each of the two or more images to generate a combined image, and determining a foreground in the combined image; and

    creating a video of said scene conveying an illusion of a camera moving around said scene, said step of creating a video is based on said set of two or more images and said step of identifying foreground, wherein said scene appears frozen in time in said illusion of said camera moving around said scene.

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