| 摘要 |
A method of determining relief elements on a tyre surface includes capturing a three-dimensional image of the surface and assigning to each pixel (i, j) of the image a grey-level value proportional to a topographic elevation of a point corresponding to the pixel, so as to obtain a starting image (f). The method also includes transforming the starting image (f) by a first top-hat operation, with aid of a first structuring element, so as to obtain an image (f1) flattened by differencing, (f1=f−γ31,150(f)). The method further includes performing a thresholding operation on the image flattened by differencing, so as to obtain a segmented image, (T<1,30>(f1)=seg1) in which relief elements appear white on a black background. |
