To calculate and acquire height of only an irregularity defect by subtracting only a portion of an irregularity mark even when the irregularity defect exists so as to overlap on the irregularity mark.
In a tire shape inspection method for inspecting a shape defect of a sidewall surface of an inspection tire by using an image of a sample tire having a sidewall surface on which an irregularity mark is formed, the following processes are executed. First, as a teaching operation process, the boundary of the irregularity mark is detected, a mask image showing the boundary is generated, an area corresponding to the boundary shown in the mask image is removed from a sample original image of the sample tire, and a height offset image representing height of the remaining area by one or a plurality of offset values is generated in the sample original image. Next, as an inspection operation process, the height offset image is subtracted from an inspection image of the inspection tire, a boundary area represented by the mask image is simultaneously removed, and a shape defect of the sidewall surface of the inspection tire is inspected on the basis of an obtained irregularity removed image.
TSUJI TOSHIYUKI
AMANAKA MASAHITO
| JP2011141260A | 2011-07-21 |
Mikio Yasuda
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