The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2015
Filed:
May. 10, 2012
Guillaume Noyel, Clermont-Ferrand Cedex 9, FR;
Jean-paul Zanella, Clermont-Ferrand Cedex 9, FR;
Alexandre Joly, Clermont-Ferrand Cedex 9, FR;
Guillaume Noyel, Clermont-Ferrand Cedex 9, FR;
Jean-Paul Zanella, Clermont-Ferrand Cedex 9, FR;
Alexandre Joly, Clermont-Ferrand Cedex 9, FR;
Compagnie Generale des Etablissments Michelin, Clermont-Ferrand, FR;
Michelin Recherche et Technique S.A., Granges-Paccot, CH;
Abstract
A method of determining relief elements on a tire 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 (ƒ). The method also includes transforming the starting image (ƒ) by a first top-hat operation, with aid of a first structuring element, so as to obtain an image (ƒ) flattened by differencing, (ƒ=ƒ—γ(ƒ)). The method further includes performing a thresholding operation on the image flattened by differencing, so as to obtain a segmented image, (T(ƒ)=seg) in which relief elements appear white on a black background.