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Image processor for automotive vehicle

  • US 7,646,890 B2
  • Filed: 04/12/2006
  • Issued: 01/12/2010
  • Est. Priority Date: 04/15/2005
  • Status: Active Grant
First Claim
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1. An image processor for an automotive vehicle comprising:

  • an imaging element for capturing an image of a road, on which the automotive vehicle is located;

    a traffic lane line detection element for detecting a position of a traffic lane line on the road by determining an edge of the traffic lane line on the basis of the image of the road;

    a distance distribution calculation element for calculating a distance distribution of an edge intensity of the traffic lane line, the distance distribution corresponding to a distance to the traffic lane line from the imaging element; and

    a detection reliability calculation element for calculating a degree of reliability of detection of the traffic lane line on the basis of the distance distribution of the edge intensity of the traffic lane;

    whereinthe detection reliability calculation element includes a detectable edge distance calculation element for calculating a detectable edge distance to the traffic lane line from the imaging element;

    the detectable edge distance is defined as a distance, at which the edge intensity in the distance distribution shows a certain change;

    the detection reliability calculation element determines the degree of reliability of detection of the traffic lane line on the basis of a length of the detectable edge distance;

    the detectable edge distance calculation element determines the detectable edge distance, at which the edge intensity is equal to or smaller than a threshold edge intensity; and

    the threshold edge intensity is determined on the basis of a maximum edge intensity in the distance distribution of the edge intensity.

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