Boundary lines which are contours of uneven marks are detected in a sample original image which is a two-dimensional image of the sidewall surface of a sample tyre, and a mask image showing the position of the boundary lines is generated. Thereupon, a height offset image which shows a height of the uneven marks is generated by, in use of a plurality of discrete height threshold values, classifying the height of regions in the sample original image which remain after excluding regions corresponding to the positions of the boundary lines shown in the mask image. An unevenness-excluded image is generated by excluding the uneven marks from an inspection image, which is a two-dimensional image of a sidewall surface of a tyre under inspection, by subtracting the height offset image from the inspection image. A shape defect in the sidewall surface of the tyre under inspection is inspected on the basis of the unevenness-excluded image.
DEVICE AND METHOD FOR INSPECTING TYRE SHAPE
VORRICHTUNG UND VERFAHREN ZUR ÜBERPRÜFUNG DER REIFENFORM
DISPOSITIF ET PROCÉDÉ D'INSPECTION LA FORME D'UN PNEU
2020-09-23
Patent
Electronic Resource
English
IPC: | B60C VEHICLE TYRES , Fahrzeugreifen / G01B MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS , Messen der Länge, der Dicke oder ähnlicher linearer Abmessungen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / 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 |