This paper proposes a method for measurement of the length of a pedestrian crossing and for the detection of traffic lights from image data observed with a single camera. The length of a crossing is measured from image data of white lines painted on the road at a crossing by using projective geometry. Furthermore, the state of the traffic lights, green (go signal) or red (stop signal), is detected by extracting candidates for the traffic light region with colour similarity and selecting a true traffic light from them using affine moment invariants. From the experimental results, the length of a crossing is measured with an accuracy such that the maximum relative error of measured length is less than 5 and the mis error is 0.38 m. A traffic light is efficiently detected by selecting a true traffic light region with an affine moment invariant.


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    Title :

    Measurement of the length of pedestrian crossings and detection of traffic lights from image data


    Additional title:

    Messung der Wegzeit von kreuzenden Fußgängern und Anzeige der Ampelfarbe aus Bilddaten


    Contributors:
    Shioyama, T. (author) / Wu, H. (author) / Nakamura, N. (author) / Kitawaki, S. (author)

    Published in:

    Publication date :

    2002


    Size :

    8 Seiten, 14 Bilder, 1 Tabelle, 9 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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