METHOD FOR DETERMINING ELEMENTS IN RELIEF ON THE SURFACE OF A TYRE

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)...

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Bibliographic Details
Main Authors NOYEL, GUILLAUME, ZANELLA, JEAN-PAUL, JOLY, ALEXANDRE
Format Patent
LanguageEnglish
French
German
Published 16.09.2015
Subjects
CALCULATING
COMPUTING
COUNTING
DEVICES OR ARRANGEMENTS RELATED TO TYRES
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
MEASURING
PERFORMING OPERATIONS
PHYSICS
REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
TRANSPORTING
TYRE CHANGING OR REPAIRING
TYRE INFLATION
VEHICLE TYRES
VEHICLES IN GENERAL
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Summary: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 (ƒ1) flattened by differencing, (ƒ1=ƒ-γ3,150(ƒ)). The method further includes performing a thresholding operation on the image flattened by differencing, so as to obtain a segmented image, (T<1,30>(ƒ1)=seg1) in which relief elements appear white on a black background.
Bibliography:Application Number: EP20120721490