In this report, the authors present a novel approach for estimating traffic speed using a sequence of images from an uncalibrated camera. They assert that exact calibration is not necessary to estimate speed. Instead, to estimate speed, they use: (1) geometric relationships inherently available in the image, (2) some common sense assumptions that reduce the problem to 1-dimensional geometry, (3) frame differencing to isolate moving edges and track vehicles between frames, and (4) parameters from the distribution of vehicle lengths.
Washington State Transportation Center (TRAC)
Calibration, Cameras, Closed circuit television, Estimating, Image processing, Traffic speed.