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System and method for hierarchical segmentation with latent semantic indexing in scale space

  • US 7,137,062 B2
  • Filed: 12/28/2001
  • Issued: 11/14/2006
  • Est. Priority Date: 12/28/2001
  • Status: Active Grant
First Claim
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1. A computer-implemented method for generating a table of contents for a document using information in said document, comprising:

  • building a model of said document including an initial semantic structure;

    detecting hierarchical changes in said semantic structure spanning different scales byapplying successively smaller scale filter windows to said model according to said initial semantic structure to construct a map of said changes versus scale;

    identifying local peaks in said contour map, said peaks being points of maximum vector derivative magnitude;

    tracing said local peaks back to a semantic structure change origin point;

    measuring a span of scales over which each said change exists; and

    ordering said changes into entries in said table of contents based on scale span.

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