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Method and device for determining the speed of a vehicle

  • US 8,140,214 B2
  • Filed: 11/16/2005
  • Issued: 03/20/2012
  • Est. Priority Date: 12/14/2004
  • Status: Expired due to Fees
First Claim
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1. A method for determining a speed of a vehicle (1), the method comprising:

  • recording at least two images (A, B) of an area surrounding the vehicle in time succession using a mono-camera on the vehicle (1) wherein the mono-camera is at least partially horizontally aligned;

    determining, between the images (A, B), changes (2) in a position and a size of at least one object (X) contained in the images, wherein the object (X) is fixed in relation to a sub-ground of the vehicle (1) and is at least one end of a middle line segment of a roadway marking; and

    determining from the changes the speed of the vehicle (1) relative to the object (X).

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