Patent application number | Description | Published |
20130129182 | Method of Monitoring the Appearance of the Surface of a Tire - Method for detecting an anomaly on the surface of a tire comprising the following steps in the course of which: A—the image of a given anomaly present on the surface of at least one tire is produced, B—with the aid of a collection of filters, a multivariate image of the said surface is constructed in a space of the filters, in which each pixel is represented in the form of a pixel vector, the components of each pixel vector having a value corresponding to the value of this pixel in the image transformed with the aid of each of the filters of the said collection, C—with the aid of a linear function, this multivariate image is transformed from the space of the filters into a spectral space of given dimension whose variables are the filters or combinations of filters of the said collection, so as to form a spectral image, D—a classifier is constructed by determining, for this anomaly, those zones representative of the spectral space which contain, in a statistically representative manner, the points of the spectral image of the said anomaly transformed into the said spectral space. | 05-23-2013 |
20140233841 | METHOD OF CHEKCING THE APPEARANCE OF THE SURFACE OF A TYRE - Detection method according to Claim | 08-21-2014 |
20140254912 | METHOD OF FAST ANALYSIS OF THE RELIEF ELEMENTS FEATURING ON THE INTERNAL SURFACE OF A TYRE - In a method of fast analysis of relief elements featuring on an inner surface of a tyre, a three-dimensional image of the surface is captured, and each pixel of the image is assigned a greyscale value proportional to a topographical elevation of a point corresponding to the pixel, so as to obtain a starting image. The image is transformed into an orthogonal reference frame (OXY) in which an abscissa axis (OX) represents circumferential values and an ordinate axis (OY) represents radial values. Each point of the surface, i.e., each pixel, is assigned an altitude gradient value (f(p)) by comparing an elevation of the point with an elevation of a discrete and reduced number of points arranged on a straight line passing through a pixel being considered (p) and oriented in a circumferential direction. | 09-11-2014 |
20140270390 | ANALYSIS OF THE DIGITAL IMAGE OF THE INTERNAL SURFACE OF A TYRE AND PROCESSING OF FALSE MEASUREMENT POINTS - A method for processing an image of a surface of a tyre under inspection is described. A three-dimensional digital image of the surface is captured and, for each point of the captured image, a grey-level value corresponding to an elevation is assigned to the point. Utilizing a first morphological operator that uses a rectangular key element, a closure-type first transformation of the image of the surface is carried out. Utilizing a second morphological operator that uses a rectangular key element, an opening-type second transformation of the surface is carried out. For each point of the image, a grey-level value equal to a minimum value between a grey-level value at that point obtained in a preceding step and a grey-level value at that point is assigned, so as to eliminate false measurement points.— | 09-18-2014 |
20140307941 | ANALYSIS OF THE DIGITAL IMAGE OF THE EXTERNAL SURFACE OF A TYRE AND PROCESSING OF FALSE MEASUREMENT POINTS - Method for processing the three-dimensional digital image of the surface of a tyre in which the three-dimensional image of the said surface is captured while assigning to each pixel of the plane of the image an item of information relating to the elevation of this point with respect to the surface to be inspected, characterized in that, with the aid of a morphological operator using a structuring element, a first transformation of the image of the surface is performed with the aid of an opening and then of a closing, so as to tailor the grey level of the pixels situated abnormally above or below the surface to be inspected. | 10-16-2014 |