The method of the invention comprises: obtaining a sequence of at least two images, with different levels of illumination; extracting the region containing the sign in the image; calculating the luminance values of the signs; and obtaining the difference in luminance of the sign corresponding to the two levels of illumination. The value obtained is the luminance of the sign (11) corresponding to an illumination equal to the difference between the illuminations, or additional illumination. This result is based on the additive property of luminance, according to which the luminance of a sign is the sum of the luminance produced by each source of illumination. A basic illumination device (5), an additional illumination device (7), at least one camera for taking images, and image recording, positioning and synchronism systems are required to implement the method.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Determination procedure of the luminance of traffic signs and device for its embodiment



    Erscheinungsdatum :

    2020-11-26


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Englisch


    Klassifikation :

    IPC:    G06K Erkennen von Daten , RECOGNITION OF DATA / B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / G06T Bilddatenverarbeitung oder Bilddatenerzeugung allgemein , IMAGE DATA PROCESSING OR GENERATION, IN GENERAL / H04N PICTORIAL COMMUNICATION, e.g. TELEVISION , Bildübertragung, z.B. Fernsehen



    Determination procedure of the luminance of traffic signs and device for its embodiment

    BURGOA ROMAN FRANCISCO JAVIER / GUITERREZ MENDEZ JOSE ANTONIO / MANSILLA GALLO ALBERTO et al. | Europäisches Patentamt | 2020

    Freier Zugriff

    Determination procedure of the luminance of traffic signs and device for its embodiment

    BURGOA ROMAN FRANCISCO JAVIER / GUTIERREZ MENDEZ JOSE ANTONIO / MANSILLA GALLO ALBERTO et al. | Europäisches Patentamt | 2018

    Freier Zugriff

    Determination procedure of the luminance of traffic signs and device for its embodiment

    BURGOA ROMAN FRANCISCO JAVIER / GUTIERREZ MENDEZ JOSE ANTONIO / MANSILLA GALLO ALBERTO et al. | Europäisches Patentamt | 2017

    Freier Zugriff


    Traffic Sign Luminance Requirements of Nighttime Drivers for Symbolic Signs

    Schnell, Thomas / Aktan, Fuat / Li, Changbao | Transportation Research Record | 2004