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1. WO2013045593 - IMPROVED METHOD OF CHECKING THE APPEARANCE OF THE SURFACE OF A TYRE

Publication Number WO/2013/045593
Publication Date 04.04.2013
International Application No. PCT/EP2012/069152
International Filing Date 27.09.2012
IPC
G06T 7/00 2006.1
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
CPC
G06K 9/6234
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
62Methods or arrangements for recognition using electronic means
6217Design or setup of recognition systems and techniques; Extraction of features in feature space; Clustering techniques; Blind source separation
6232Extracting features by transforming the feature space, e.g. multidimensional scaling; Mappings, e.g. subspace methods
6234based on a discrimination criterion, e.g. discriminant analysis
G06K 9/6247
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
62Methods or arrangements for recognition using electronic means
6217Design or setup of recognition systems and techniques; Extraction of features in feature space; Clustering techniques; Blind source separation
6232Extracting features by transforming the feature space, e.g. multidimensional scaling; Mappings, e.g. subspace methods
6247based on an approximation criterion, e.g. principal component analysis
G06K 9/6269
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
62Methods or arrangements for recognition using electronic means
6267Classification techniques
6268relating to the classification paradigm, e.g. parametric or non-parametric approaches
6269based on the distance between the decision surface and training patterns lying on the boundary of the class cluster, e.g. support vector machines
G06T 2207/20021
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
2207Indexing scheme for image analysis or image enhancement
20Special algorithmic details
20021Dividing image into blocks, subimages or windows
G06T 7/0004
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
0002Inspection of images, e.g. flaw detection
0004Industrial image inspection
G06T 7/001
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
7Image analysis
0002Inspection of images, e.g. flaw detection
0004Industrial image inspection
001using an image reference approach
Applicants
  • COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN [FR]/[FR] (AllExceptUS)
  • MICHELIN RECHERCHE ET TECHNIQUE S.A. [CH]/[CH] (AllExceptUS)
  • NOYEL, Guillaume [FR]/[FR] (US)
  • JEULIN, Dominique [FR]/[FR] (US)
  • PARRA-DENIS, Estelle [FR]/[FR] (US)
  • BILODEAU, Michel [FR]/[FR] (US)
Inventors
  • NOYEL, Guillaume
  • JEULIN, Dominique
  • PARRA-DENIS, Estelle
  • BILODEAU, Michel
Agents
  • REYNAUD, Georges
Priority Data
115880030.09.2011FR
Publication Language French (fr)
Filing Language French (FR)
Designated States
Title
(EN) IMPROVED METHOD OF CHECKING THE APPEARANCE OF THE SURFACE OF A TYRE
(FR) METHODE AMELIOREE DE CONTROLE DE L'ASPECT DE LA SURFACE D'UN PNEUMATIQUE
Abstract
(EN) Method of detection according to claim 9, in which, - the grey level image of the interior surface of a tyre to be checked is captured, and this starting image is transformed into an orthonormal space in which the abscissa axis (OX) represents the circumferential direction, and the ordinate axis (OY), - the predetermined series of filters is applied to the starting image of the interior surface of the tyre to be checked so as to obtain a multivariate starting image, - the multivariate starting image is split according to the predefined tiling into the axial and circumferential directions, in such a way as to obtain multivariate imagettes of the interior surface of the tyre to be checked, - each of the multivariate imagettes is transformed into unidimensional vectors, with the aid of each of the selected descriptors, in such a way as to obtain a simplified multivariate image of the interior surface of the tyre to be checked, - the simplified multivariate image is transformed into the common reduced factor space, - with the aid of a classifier able to identify the zones of the reduced common factor space wherein the anomalies are accommodated, the imagettes of the interior surface of the tyre to be checked containing an anomaly are located.
(FR) Méthode de détection selon la revendication 9, dans laquelle, - on capture l'image en niveau de gris de la surface intérieure d'un pneumatique à contrôler, et on transforme cette image de départ dans un espace orthonormé dans lequel l'axe des abscisses (OX) représente la direction circonférentielle, et l'axe des ordonnées (OY), - on applique à l'image de départ de la surface intérieure du pneumatique à contrôler la série prédéterminée de filtres pour obtenir une image de départ multivariée, - on découpe l'image de départ multivariée selon le pavage prédéfinit dans les directions axiales et circonférentielles, de manière à obtenir des imagettes multivariées de la surface intérieure du pneumatique à contrôler, - on transforme chacune des imagettes multivariées en vecteurs unidimensionnels, à l'aide de chacun des descripteurs selectionnés, de manière à obtenir une image multivariée simplifiée de la surface intérieure du pneumatique à contrôler, - on transforme l'image multivariée simplifiée dans l'espace factoriel réduit commun, - à l'aide d'un classificateur apte à identifier les zones de l'espace factoriel commun réduit où sont logées les anomalies, on localise les imagettes de la surface intérieure du pneumatique à contrôler contenant une anomalie.
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