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Automatic surveillance video matting using a shape prior

  • US 10,147,021 B2
  • Filed: 02/29/2016
  • Issued: 12/04/2018
  • Est. Priority Date: 11/07/2011
  • Status: Active Grant
First Claim
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1. A method comprising:

  • computing an initial alpha matte from an input image; and

    automatically updating the initial alpha matte, wherein automatically updating comprises;

    selecting one or more shape models from a shape model database, wherein the shape model database comprises a plurality of principal component analysis-based shape models trained using eigen analysis;

    incorporating the one or more shape models into the initial alpha matte;

    incorporating one or more alignment parameters into the initial alpha matte to align the one or more shape models in the initial alpha matte; and

    optimizing the initial alpha matte to obtain an optimized alpha matte, wherein optimizing the initial alpha matte to obtain the optimized alpha matte comprises iteratively solving a quadratic cost function to determine the one or more alignment parameters that produce a minimum value of the quadratic cost function.

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