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Method of assisting detection of man-made structures in a digital elevation map (DEM)

  • US 6,104,981 A
  • Filed: 02/19/1998
  • Issued: 08/15/2000
  • Est. Priority Date: 02/20/1997
  • Status: Expired due to Fees
First Claim
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1. A method of detecting regions of interest containing man-made structures in a terrain representation, wherein said terrain representation is a digital elevation map, and wherein said method comprises:

  • providing information representing the digital elevation map and information representing a size criterion;

    using a computer to compute isolines in said provided digital elevation map;

    filtering said computed isolines on the basis of the provided size criterion;

    computing extremum isolines from the filtered isolines; and

    isolating said regions of interest containing man-made structures from regions delimited by the computed extremum isolines.

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