Equipment for the automatic assessment of road signs and panels

Details Equipment for the automatic assessment of road signs and panels Equipment for the automatic assessment of road signs and panels

H - Electricity

04

N

H04N 13/00 (2006.01) B60R 1/00 (2006.01) B60R 21/00 (2006.01) G02B 23/12 (2006.01) G02B 27/00 (2006.01) G06T 5/00 (2006.01)

Patent

CA 2727640

The invention relates to equipment for the automatic assessment of road signs and panels, said equipment performing, for said purpose, a retroreflection measurement of the white element of said signs or panels, and a measurement of the contrast between the white element of the sign or panel and a characteristic element of same (borders or text) in order to ensure a particular level of legibility. To this end, a vehicle (1) is equipped with a pulsed infrared illumination system (3), a system of stereoscopic cameras (2), a G P S (11), an odometer (12), a computer (5) mounted on an industrial rack, a data storage system (8), an event keyboard (7), and a T F T monitor (6) for viewing results. The infrared illumination system (3) is synchronised with the cameras (2). In this way, the infrared illuminator (3) illuminates the road area in alternate images, thereby providing illuminated road images and non-illuminated road images.

L'invention concerne un équipement destiné à réaliser le contrôle automatique de signaux et de panneaux de trafic, par mesure de la rétroréflexion de l'élément blanc de ces signaux ou panneaux, et par mesure du contraste entre l'élément blanc dudit signal ou panneau et un élément caractéristique de ceux-ci (bordure ou texte), de façon qu'un niveau de lisibilité déterminé soit garanti. A cet effet, on utilise un véhicule (1) équipé d'un système d'éclairage infrarouge pulsé (3), d'un système de caméras stéréoscopiques (2), d'un GPS (11), d'un odomètre (12), d'un ordinateur (5) installé sur un rack industriel, d'un système de stockage de données (8), d'un clavier d'entrée d'informations (7) et d'un écran TFT (6) pour la visualisation de résultats. Le système d'éclairage infrarouge (3) est synchronisé avec les caméras (2). Ainsi, ledit système d'éclairage infrarouge (3) éclaire la scène de route en alternance d'une trame à l'autre, ce qui permet d'obtenir des images de la route avec éclairage et des images sans éclairage.

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