Patent Document ID: 9953409
Application ID: 15101573
Patent Status: 1

Claim One:
1. A tire inspection method comprising the steps of: performing two dimension Fourier transformation on a captured transmission electromagnetic wave image obtained from electromagnetic waves transmitting through: a first region in a tire in which a plurality of reinforcing wires disposed in a reinforcing layer of the tire extends from first ends of the reinforcing wires at an incline in a first direction with respect to a tire width direction, and a second region in the tire in which the reinforcing wires extend at an incline in a second direction different from the first direction due to the reinforcing layer being turned up, wherein the tire comprises a layer-like skeleton member including a plurality of tire skeleton wires disposed in the first region and the second region, the tire skeleton wires extending in a third direction different from the first direction and the second direction and including third ends located in the first region, and wherein the captured image includes images of the reinforcing wires and the skeleton wires; extracting a first image component including the first ends of the reinforcing wires located in the first region from a process result of the two dimension Fourier transformation using a first spatial filter generated in accordance with the incline in the first direction; acquiring a first processed image including the first ends located in the first region by performing inverse two dimension Fourier transformation on an extraction result of the first image component; generating a working image from the captured image by removing the images of the reinforcing wires located in the first region using the captured image and the first processed image; identifying positions of the first ends in the captured image using the first processed image; identifying positions of the third ends of the skeleton wires in the captured image using the working image; inspecting a position of an edge of the reinforcing layer in the tire on the basis of the positions of the first ends; and inspecting a position of an edge of the skeleton member in the tire on the basis of the identified positions of the third ends.