An algorithm to estimate mean traffic speed using uncalibrated cameras

  • Authors:
  • D. J. Dailey;F. W. Cathey;S. Pumrin

  • Affiliations:
  • Dept. of Electr. Eng., Washington Univ., Seattle, WA;-;-

  • Venue:
  • IEEE Transactions on Intelligent Transportation Systems
  • Year:
  • 2000

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Abstract

We present a novel approach to estimate traffic speed using a sequence of images from an uncalibrated camera. We assert that exact calibration is not necessary to estimate speed. Instead, we use: 1) geometric relationships inherently available in the image, 2) some common-sense assumptions that reduce the problem to a one-dimensional geometry, 3) frame differencing to isolate moving edges and track vehicles between frames, and 4) parameters from the distribution of vehicle lengths to estimate speed