METHOD FOR DETECTING DEFECT IN TIRE

PROBLEM TO BE SOLVED: To provide a method for detecting defects in a tire, capable of accurately detecting a thinly spread protrusion defect of the tire surface.SOLUTION: Prior to the start of a step S1, two-dimensional images including a slit light image are continuously acquired in advance. In the...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIWARA TAKAYUKI, IWATANI TOSHIHIKO, IMADA MUNETOSHI, MIZUKUSA HIROKATSU, KOSHIMIZU YAMATO
Format:	Patent
Sprache:	eng
Schlagworte:	CALCULATING COMPUTING COUNTING IMAGE DATA PROCESSING OR GENERATION, IN GENERAL INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEASURING ANGLES MEASURING AREAS MEASURING IRREGULARITIES OF SURFACES OR CONTOURS MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a method for detecting defects in a tire, capable of accurately detecting a thinly spread protrusion defect of the tire surface.SOLUTION: Prior to the start of a step S1, two-dimensional images including a slit light image are continuously acquired in advance. In the step S1, a slit light image is extracted from the plurality of two-dimensional shot image data. In a step S2, an eccentric component which is deviation resulting from eccentricity is removed from the extracted slit light image. In a step S3, a feature value is calculated based on the light image excluding the eccentric component. In a step S4, a thinly spread protrusion defect is detected based on the calculated feature value.