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Method and system for correcting projective distortions using eigenpoints

  • US 8,913,836 B1
  • Filed: 12/20/2013
  • Issued: 12/16/2014
  • Est. Priority Date: 12/20/2013
  • Status: Active Grant
First Claim
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1. A method for projective correction of an image containing at least one text portion that is distorted by perspective, the method comprising the steps of:

  • image binarization, wherein said image is binarized;

    connected component analysis, wherein pixel blobs are detected in said at least one text portion of said binarized image;

    horizontal vanishing point determination, comprising estimating text baselines by means of eigenpoints of said pixel blobs and determining a horizontal vanishing point of said at least one text portion by means of said text baselines;

    vertical vanishing point determination, wherein a vertical vanishing point is determined for said at least one text portion on the basis of vertical features thereof;

    and projective correction, wherein said perspective in said image is corrected on the basis of said horizontal and vertical vanishing points.

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