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Geometric parameter measurement of an imaging device

  • US 8,818,130 B2
  • Filed: 11/21/2008
  • Issued: 08/26/2014
  • Est. Priority Date: 12/21/2007
  • Status: Active Grant
First Claim
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1. A method of determining three-dimensional (3D) geometric parameters of an imaging device, the method comprising the steps of:

  • (a) providing a two-dimensional (2D) target image comprising a plurality of alignment patterns;

    (b) imaging said target image with an imaging device to form a captured image;

    (c) comparing at least one said pattern of said captured image with a corresponding pattern of said target image; and

    (d) determining from said comparison said geometric parameters of the imaging device,wherein the geometric parameters comprise at least one geometric parameter describing a geometric lens distortion transformation between said target image and said captured image and at least one geometric parameter describing a perspective transformation between said target image and said captured image,wherein the geometric parameter describing the perspective transformation is determined based on said geometric parameter describing the geometric lens distortion transformation.

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