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Method and system for calibrating digital cameras

  • US 6,437,823 B1
  • Filed: 04/30/1999
  • Issued: 08/20/2002
  • Est. Priority Date: 04/30/1999
  • Status: Active Grant
First Claim
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1. A computer-implemented calibration process for a digital camera, comprising the following steps:

  • acquiring an object having a planar surface and a pattern disposed on said planar surface;

    establishing surface coordinates of at least four feature points of the pattern on the planar surface;

    capturing at least two images of the planar pattern with the camera being calibrated, each of said images depicting the pattern from a different, non-parallel orientation; and

    using a computer to, ascertain the image coordinates of every image point in each captured image that depicts one of said feature points of the pattern, and estimating unknown intrinsic parameters of the digital camera using the surface coordinates of the feature points of the pattern and the image coordinates of the corresponding images points in each of the captured images.

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