Vehicle movement measuring apparatus

  • US 5,509,082 A
  • Filed: 12/07/1993
  • Issued: 04/16/1996
  • Est. Priority Date: 05/30/1991
  • Status: Expired due to Fees
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First Claim
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1. A vehicles movement measuring apparatus comprising:

  • a video camera, oriented to face in a direction corresponding to a downstream direction of traffic flow along a road, for outputting first video signals indicative of a first video imaging area of said road and second video signals indicative of a second video imaging area of said road, said first and second video imaging areas being spaced apart from one another and said first video imaging area being located closer than said second video imaging area to said video camera;

    A/D converting means for converting said first and second video signals of said first and second video cameras into first and second digital image data;

    a plurality of image memory means for separately storing said first and second digital image data, wherein a first one of said plurality of said image memory means stores said first digital image data, and a second one of said plurality of said image memory means stores said second digital image data; and

    image processing means for processing, in response to passage of time, (i) said first digital image data stored in said plurality of image memory means so as to provide data on presence and movement of vehicles within said first imaging area and (ii) said second digital image data stored in said plurality of image memory means so as to provide data on a degree of traffic jam within said second imaging area.

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