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Correcting an epipolar axis for skew and offset

  • US 6,674,892 B1
  • Filed: 11/01/1999
  • Issued: 01/06/2004
  • Est. Priority Date: 11/01/1999
  • Status: Expired due to Fees
First Claim
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1. A computer-implemented method for correcting an epipolar axis to approximate a horizontal axis, the epipolar axis associated with first and second images of a stereo image pair, where a first region of the first image corresponds to a second region of the second image, the method comprising:

  • partitioning the first and second images into a plurality of vertically striped regions, each region of the first image corresponding to a region of the second image;

    vertically shifting a region of the first image in a direction calculated to vertically align a portion of the region with a substantially matching portion of the corresponding region;

    identifying a portion of the second region that substantially matches a portion of the first region;

    calculating a vertical offset between the portion of the first region and the substantially matching portion of the second region;

    vertically shifting the first region according to the calculated vertical offset to vertically align the substantially matching portions of the first and second regions;

    repeating the identifying and calculating steps for at least two portions of the first region in order to calculate at least two vertical offsets; and

    determining an average of the at least two vertical offsets.

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