Sharp Kabushiki Kaisha Corporation

Toyo Tire Rubber Co., Ltd.

Munetoshi Imada

Hirokatsu Mizukusa

Toshihiko Iwatani

Takayuki Fujiwara

Hiroyasu Koshimizu

Provided is a tire defect detection method capable of accurately detecting a thinly extending convex defect of a tire surface. Prior to the start of Step S, two-dimensional images including a slit light image are successively obtained in advance. In Step S, a slit light image is extracted from data of a plurality of shot two-dimensional images. In Step S, an eccentricity component which is deviation resulting from eccentricity is eliminated from the extracted slit light image. In Step S, a feature quantity is calculated based on the light image from which the eccentricity component is eliminated, and in Step S, a thinly extending convex defect is detected based on the calculated feature quantity.

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Osaka, Japan

Munetoshi Imada