Traffic surveillance system

  • US 5,161,107 A
  • Filed: 10/25/1990
  • Issued: 11/03/1992
  • Est. Priority Date: 10/25/1990
  • Status: Expired due to Fees
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First Claim
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1. A traffic surveillance system for detecting the presence of vehicles and for generating signals for operating a traffic light, comprising:

  • means for receiving electromagnetic wavelengths of varying frequencies from the vehicle;

    a plurality of filter means for receiving said electromagnetic wavelengths from said receiving means and passing portions of said electromagnetic wavelengths according to said varying frequencies in the electromagnetic spectrum, each filter means passing a different portion of the electromagnetic spectrum;

    means receiving the electromagnetic wavelengths passed by said plurality of filter means for translating said portions of said electromagnetic wavelengths passed by said filter means into a corresponding plurality of images;

    means coupled to said translating means for selecting one of said images formed from said portions of said electromagnetic wavelength as a function of varying detectability conditions;

    image processing means coupled to said selecting means which uses said selected image to determine if a vehicle is present and generates a signal indicative thereof; and

    means coupled to said image processing means for receiving said indicating signal and for changing the traffic light according to said signal.

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