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    Camera to Emitter Distance Estimation Using Pixel Gray-Levels

    TitleCamera to Emitter Distance Estimation Using Pixel Gray-Levels
    Publication TypeJournal Article
    Año de publicación2009
    AutoresLazaro, JL, Cano, A, Esteban, O, Pompa, Y
    Idioma de publicaciónEnglish
    JournalSensor Letters
    Volumen7
    Número2
    Páginas133-142
    Fecha de publicación04/2009
    EditorialAmerican Scientific Publishers
    Rank in category11/55
    JCR CategoryInstruments & Instrumentation
    JCR Impact Factor1.587
    ISSN1546-198X
    DOI10.1166/sl.2009.1023
    Abstract

    In this paper, a camera to infrared emitter diode (IRED) distance estimation problem (CEDEP) is analysed, and a model for solving it is proposed. The model is based on image processing from a radiometric point of view. To define the model, the behaviour of accumulated image irradiance with different IRED radiant intensities, camera exposition times, and distances between the IRED and the camera were analysed. In the paper the model is defined and the calibration process used to obtain values for the model's parameters is described. Two experiments for distance estimation were carried out. The first experiment was over distances of 200 to 380 cm, where an error of less than 1% was obtained. In the second experiment the CEDEP model was tested for distances of more than 400 cm. In the second experiment an error of 2% was obtained over a range of distances between 400 and 600 cm.

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