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Optical vehicle detection system

  • US 4,433,325 A
  • Filed: 09/29/1981
  • Issued: 02/21/1984
  • Est. Priority Date: 09/30/1980
  • Status: Expired due to Fees
First Claim
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1. An optical vehicle detection system comprising:

  • camera means for catching the image of a vehicle running in a selected roadway lane to generate an output video signal,inquiring means for inquiring if said output video signal includes a predetermined vehicle shadow signal component, andprocessing means associated with said inquiring means, for processing said output video signal as a signal having a component of shadow cast by a vehicle, when said output video signal includes the predetermined shadow signal component.

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