A method and device for detecting image artifacts. Pixel transition values of camera images are computed in a first direction by comparing intensity differences between neighbouring pixels with an upper threshold and a lower threshold and setting a corresponding pixel transition value. A low pass filter with respect to time and a spatial filter are applied to the pixel transition values. Pixels of potential artifact regions are identified by comparing magnitude values of the smoothed pixel transition values with a predetermined detection threshold. A method and device for correcting image artifacts. Pixel quotient values of camera images are computed for a first direction. The quotient values are derived from an image intensity of a pixel divided by an intensity of a neighbouring pixel in the first direction. Median values of the respective pixel quotient values are computed. A pixel attenuation factor is obtained as an iterative solution of a matrix equation, wherein a matrix of the matrix equation comprises the median values. Corrected pixel intensities are obtained by dividing the observed pixel intensities by the corresponding pixel attenuation factors.


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    Title :

    STATIC SOILING DETECTION AND CORRECTION


    Additional title:

    STATISCHE VERSCHMUTZUNGSERKENNUNG UND KORREKTUR
    DÉTECTION ET CORRECTION DE SALISSURES STATIQUES


    Contributors:

    Publication date :

    2018-12-05


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen



    STATIC SOILING DETECTION AND CORRECTION

    GUERREIRO RUI | European Patent Office | 2017

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