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Technique for edge/corner detection/tracking in image frames

  • US 5,311,305 A
  • Filed: 06/30/1992
  • Issued: 05/10/1994
  • Est. Priority Date: 06/30/1992
  • Status: Expired due to Term
First Claim
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1. A method for detecting and tracking edges/corners in an image captured by a camera comprising the steps of,periodically sampling the image at regular time intervals;

  • processing each sampled image to establish an intensity for each of a plurality of individual picture elements (pixels) collectively comprising said sampled image;

    computing an intraframe bidirectional correlation of the intensity of each pixel in each said sampled image with each of the pixels within a predetermined neighborhood in said image to detect line and surface singularities in spatiotemporal space;

    computing an interframe bidirectional correlation of the intensity of each pixel in said each sampled image with each of the pixels in a predetermined neighborhood in each of other sampled images to detect line and surface singularities in spatiotemporal space and the movement of said line and surface singularities; and

    determining, from said interframe and intraframe bidirectional correlations, the presence of an edge/corner in each sampled image and its motion over time.

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