Method and apparatus for detecting defects on tyres in a tyre production process
US10006836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2015 |
| Grant date | Jun 26, 2018 |
| Priority date | — |
| Expiry date | Dec 18, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for detecting defects on tires in a tire production process. The method includes: receiving a reference image of a surface portion of a reference tire substantially defects-free; providing a sample tire to be analyzed; illuminating a surface portion of the sample tire with a raking light source; acquiring a sample image of the illuminated surface portion of the sample tire; extracting the edges from the reference image and from the sample image and respectively generating an edge reference image and an edge sample image; carrying out a dilation of the edges of the edge reference image and generating therefrom a dilated edge reference image; comparing the edge sample image with respect to the dilated edge reference image and generating an edge image of possible defects; and identifying the edges in the edge image of possible defects.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.