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DESCRIBING OBJECTS USING EDGE-PIXEL-FEATURE DESCRIPTORS

  • US 20150363663A1
  • Filed: 01/21/2013
  • Published: 12/17/2015
  • Est. Priority Date: 01/21/2013
  • Status: Active Grant
First Claim
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1. A computer-system-implemented method for generating at least one descriptor for an object, the method comprising:

  • receiving extracted line segments aligned with edge pixels associated with the object in an image;

    determining orientations for the line segments;

    identifying a subset of the line segments, wherein the subset includes k of the line segments that are proximate to a given line segment in the line segments;

    using the computer system, calculating pairs of angles representing relative displacement and relative orientation of pairs of line segments in the subset, wherein a given pair of angles for a given pair of line segments in the subset includes;

    a first angle at a location on a first line segment in the given pair of line segments between the first line segment and a second line segment in the given pair of line segments, and a second angle at a location on the second line segment between the second line segment and the first line segment; and

    generating the at least one descriptor for the object by computing a 2-dimensional (2D) histogram of the pairs of angles based on cells defined by angular quantization values.

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