发明名称 |
METHOD FOR DETERMINING MARKINGS IN RELIEF ON THE OUTER SURFACE OF THE SIDEWALL OF A TYRE |
摘要 |
A method of determining relief markings on a tire's sidewall surface includes assigning, to each pixel of a three-dimensional image of the surface, a grey-level value proportional to an elevation point corresponding to the pixel, to obtain a starting image. Using linear structuring elements of successively increasing sizes and oriented circumferentially, a series of successive morphological openings is performed iteratively on the starting surface. An image value obtained after a morphological opening using a structuring element is subtracted from an image value obtained after a morphological opening using a structuring element of an immediately lower size, to obtain a succession of images flattened by differencing. A thresholding operation is performed on the images flattened by differencing, to obtain binary images. A set-theoretic union of values of each of the binary images is performed, to obtain a final binary image in which markings appear in relief. |
申请公布号 |
EP2710552(B1) |
申请公布日期 |
2015.09.16 |
申请号 |
EP20120722108 |
申请日期 |
2012.05.10 |
申请人 |
COMPAGNIE GÉNÉRALE DES ETABLISSEMENTS MICHELIN;MICHELIN RECHERCHE ET TECHNIQUE S.A. |
发明人 |
NOYEL, GUILLAUME;ZANELLA, JEAN-PAUL;JOLY, ALEXANDRE |
分类号 |
G06T7/00;G06T5/30;G06T5/40;G06T5/50 |
主分类号 |
G06T7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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