Abstract: Method and related apparatus for detecting defects on a surface of a tyre, comprising: providing the tyre (200); acquiring a digital image comprising a structure comprising sections representative of linear elements of a pattern in a surface portion and representative of possible elongated defects, said sections of the structure having a respective orientation; providing a model of the pattern in the surface portion, wherein each pixel is associated with a first index representative of whether the pixel belongs or not to a pattern section and a second index representative of an at least local orientation of the pattern section passing through said pixel; calculating for each pixel of the structure a third index representative of the orientation of the structure section passing through said pixel; and establishing, for each pixel of the structure having a corresponding pixel in the pattern model belonging to the pattern, whether said pixel of the structure belongs to a proposed defect on the basis of the compa

Abstract: Method and related apparatus for analysing a surface of a tyre, includes: acquiring one or more digital images of a surface portion having a pattern that includes a scheme that is repeated substantially equal thereto in a plurality of positions; identifying a plurality of first regions of said one or more digital images, each corresponding to a respective scheme sub-portion; identifying a respective plurality of regions homologous to each first region, wherein the respective scheme sub-portion is substantially identical to the respective scheme sub-portion of each first region; calculating a model of the respective scheme sub-portion, where each pixel is associated with a mean value of the values associated with the pixels of each first region and of the respective homologous regions having the same relative coordinates of said each pixel; and obtaining a pattern model using the calculated scheme sub-portion models.

Abstract: Method and related apparatus for detecting defects on a surface of a tyre, comprising: providing the tyre (200); acquiring a digital image comprising a structure comprising sections representative of linear elements of a pattern in a surface portion and representative of possible elongated defects, said sections of the structure having a respective orientation; providing a model of the pattern in the surface portion, wherein each pixel is associated with a first index representative of whether the pixel belongs or not to a pattern section and a second index representative of an at least local orientation of the pattern section passing through said pixel; calculating for each pixel of the structure a third index representative of the orientation of the structure section passing through said pixel; and establishing, for each pixel of the structure having a corresponding pixel in the pattern model belonging to the pattern, whether said pixel of the structure belongs to a proposed defect on the basis of the compa

Abstract: Method and related apparatus for detecting defects on a surface of a tire, include: providing the tire; acquiring a digital image including a structure including sections representative of linear elements of a pattern in a surface portion and representative of possible elongated defects, the sections of the structure having a respective orientation; providing a model of the pattern in the surface portion, wherein each pixel is associated with a first index representative of whether the pixel belongs or not to a pattern section and a second index representative of an at least local orientation of the pattern section passing through the pixel; calculating for each pixel of the structure a third index representative of the orientation of the structure section passing through the pixel; and establishing, for each pixel of the structure having a corresponding pixel in the pattern model belonging to the pattern, whether the pixel of the structure belongs to a proposed defect on the basis of the comparison between t

Abstract: Method and related apparatus for detecting defects on a surface of a tyre, include: providing the tyre: acquiring a digital image including a structure including sections representative of linear elements of a pattern in a surface portion and representative of possible elongated defects, the sections of the structure having a respective orientation; providing a model of the pattern in the surface portion, wherein each pixel is associated with a first index representative of whether the pixel belongs or not to a pattern section and a second index representative of an at least local orientation of the pattern section passing through the pixel; calculating for each pixel of the structure a third index representative of the orientation of the structure section passing through the pixel; and establishing, for each pixel of the structure having a corresponding pixel in the pattern model belonging to the pattern, whether the pixel of the structure belongs to a proposed defect on the basis of the comparison between t

Abstract: Method and related apparatus for analysing a surface of a tyre, includes: acquiring one or more digital images of a surface portion having a pattern that includes a scheme that is repeated substantially equal thereto in a plurality of positions; identifying a plurality of first regions of said one or more digital images, each corresponding to a respective scheme sub-portion; identifying a respective plurality of regions homologous to each first region, wherein the respective scheme sub-portion is substantially identical to the respective scheme sub-portion of each first region; calculating a model of the respective scheme sub-portion, where each pixel is associated with a mean value of the values associated with the pixels of each first region and of the respective homologous regions having the same relative coordinates of said each pixel; and obtaining a pattern model using the calculated scheme sub-portion models.