| 摘要 |
A tire shape inspection method for executing a process of inspecting a shape defect in a sidewall surface of a tire in which embossed marks are formed, the shape defect inspection process being executed based on surface height distribution information that is prepared by plotting surface height measurement values at various positions over an entire circumferential range of the sidewall surface in a two-dimensional coordinate system, which has a first coordinate axis representing a radial direction of the tire and a second coordinate axis representing a circumferential direction of the tire, the tire shape inspection method comprising: a two-dimensional edge detection step of detecting edges of the embossed marks with a two-dimensional edge detection process executed on the surface height distribution information, and storing detected two-dimensional edge distribution information in a storage unit; a labeling step of executing labeling on the two-dimensional edge distribution information, and storing label distribution information obtained with the labeling in the storage unit; a mask range setting step of setting coordinates of the mask range, which surrounds a range where the embossed mark exists, based on filet coordinates for each label value in the label distribution information, and storing the set coordinates in the storage unit; and a mask-range interpolation step of replacing those surface height measurement values, which are included in the surface height distribution information used in the shape defect inspection process and which fall within the mask range, with values interpolated based on those surface height measurement values falling outside the aforesaid range. |
