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Camera/lens calibration apparatus and method

  • US 5,930,740 A
  • Filed: 04/04/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 04/04/1997
  • Status: Expired due to Term
First Claim
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1. A method for generating a viewport for a computer generated image using sensor information relating to settings of a video camera'"'"'s pan, tilt, zoom, and focus, the method comprising the steps of:

  • (a) establishing reference points within an enclosed space which is to be used for recording images with the camera;

    (b) positioning the camera within the enclosed space relative to the reference points such that the camera position can be determined through triangulation with respect to the reference points;

    (c) developing position data through triangulation which identifies the camera position in a coordinate system relative to the reference points;

    (d) recording camera orientation data from sensors disposed to detect camera parameters that define the camera'"'"'s pan, tilt, zoom, and focus settings; and

    (e) developing a database defining a viewport for the camera, the database defined from a combination of the position data and the camera orientation data.

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