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Extracting a matte of a foreground object from multiple backgrounds by triangulation

  • US 6,301,382 B1
  • Filed: 06/06/1997
  • Issued: 10/09/2001
  • Est. Priority Date: 06/07/1996
  • Status: Expired due to Term
First Claim
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1. A method for extracting an image of a foreground object from composite images, using a computer, comprising the steps of:

  • (a) recording a first composite image that includes the foreground object disposed in front of a first background having a first arbitrary coloring;

    (b) recording a second composite image that includes the foreground object disposed in front of a second background having a second arbitrary coloring that is different than the first arbitrary coloring;

    (c) obtaining a set of color coordinates for each point in the first composite image and in the second composite image, said color coordinates defining a color for each point; and

    (d) triangulating the set of color coordinates for each point in each of the first and the second composite images, the step of triangulating returning an alpha value and a set of color coordinates for each point in the image of the foreground object, to define the image of the foreground object apart from any background.

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