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Error Compensation in Three-Dimensional Mapping

  • US 20110096182A1
  • Filed: 10/25/2009
  • Published: 04/28/2011
  • Est. Priority Date: 10/25/2009
  • Status: Abandoned Application
First Claim
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1. A method for forming a three-dimensional (3D) map of an object, comprising:

  • illuminating the object from a light source so as to project a pattern onto the object;

    capturing an image of the pattern on the object using an array of detector elements;

    processing the captured image so as to measure respective offsets of elements of the pattern in the captured image relative to a reference pattern, the offsets comprising at least a first offset of a first element of the pattern and a second offset of a second element of the pattern, measured respectively in first and second, mutually-perpendicular directions in a plane of the array;

    computing a geometrical correction factor in response to the first offset;

    applying the geometrical correction factor to the second offset so as to find a corrected offset; and

    computing depth coordinates of the object in response to the corrected offset.

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