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.
STATIC SOILING DETECTION AND CORRECTION
STATISCHE VERSCHMUTZUNGSERKENNUNG UND KORREKTUR
DÉTECTION ET CORRECTION DE SALISSURES STATIQUES
2018-12-05
Patent
Electronic Resource
English
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 |
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