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Method and system for perspectively distoring an image and implanting same into a video stream

  • US 5,731,846 A
  • Filed: 01/18/1996
  • Issued: 03/24/1998
  • Est. Priority Date: 03/14/1994
  • Status: Expired due to Term
First Claim
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1. A method for implanting an image into a selected one at a time of a plurality of video frames representing a stream of action occurring within a background space, the space having fixed planar surfaces and being scanned by at least one video camera, the method comprising:

  • generating a model, independent of said plurality of video frames, of a selected one of said fixed surfaces, said model comprising a representation of geometrical features characterizing said surface;

    utilizing said model to perspectively distort said image so as to provide it in generally the same perspective of said selected frame;

    producing a background mask of said selected frame, said frame comprising at least a portion of said fixed surface, said background mask defines changeable regions of said selected frame and unchangeable regions thereof; and

    blending said perspectively distorted image into said selected portion of said changeable region, thereby implanting said image into said selected frame.

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