The potential benefits offered by high-intensity discharge (HID) sources for vehicle headlamps have raised new issues in the design of headlamp beam patterns. The primary purpose of the present study is to address some of those issues by quantifying the effects of one major aspect of headlamp beam patterns--foreground light--on visual performance. We measured the seeing distance to a dark-clad pedestrian at night on a two-lane road as a function of observer age, foreground luminance, and pavement condition (dry/wet). Observers sat in the driver's seat of a stationary vehicle positioned on the road while a pedestrian walked either toward or away from the vehicle. The observer indicated when the pedestrian just became visible or invisible, depending on the direction of movement. Two major limitations apply to the interpretation of the effects observed in this study. First, the effects of glare from opposing headlamps were not measured. Second, only the effects of pavement wetness itself were measured, not the effects of active precipitation.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Effects of Foreground Illumination, Wet Pavement, and Driver Age on Pedestrian Detection Distance


    Beteiligte:
    M. J. Flannagan (Autor:in) / M. Sivak (Autor:in) / E. C. Traube (Autor:in) / M. Aoki (Autor:in)

    Erscheinungsdatum :

    1995


    Format / Umfang :

    32 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Foreground detection

    JALES COSTA BRUNO SIELLY / CORONA ENRIQUE / PUSKORIUS GINTARAS VINCENT et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    FOREGROUND DETECTION

    JALES COSTA BRUNO SIELLY / CORONA ENRIQUE / PUSKORIUS GINTARAS VINCENT et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Adaptive learning of multi-subspace for foreground detection under illumination changes

    Dong, Y. / DeSouza, G. N. | British Library Online Contents | 2011


    Influence of foreground illumination from headlamps on visibility and preferences

    Bullough,J.D. / Skinner,N.P. / Rensselaer Polytechnic Inst.,US | Kraftfahrwesen | 2009


    Influence of Foreground Illumination from Headlamps on Visibility and Preference

    Bullough, John D. / Skinner, Nicholas P. | SAE Technical Papers | 2009