### Samenvatting

A frequently occurring issue in hot rolling of steel is so-called tail pinching. Prominent features of a pinched tail are ripple-like defects and a pointed tail. In this report two algorithms are presented to detect those features accurately in 2D gray scale images of steel strips. The two ripple detectors are based on the second order Gaussian derivative and the Gabor transform, a localized Fourier transform, yielding the so-called rippleness measures. Additionally a parameter called tail length is defined which indicates to what extent the overall shape of the tail deviates from an ideal rectangular shape. These methods are tested on images from the surface inspection system at Tata Hot Strip Mill 2 in IJmuiden, it is shown that by defining a simple criterion in the feature space spanned by these two parameters a given set of strips can correctly be classified into pinched and nonpinched strips. These promising results open the way for the development of an automatic pinch detection system.

Originele taal-2 | Engels |
---|---|

Titel | Proceedings of the 84th European Study Group Mathematics with Industry (SWI 2012) |

Redacteuren | M.A.A. Boon |

Pagina's | 22-38 |

Status | Gepubliceerd - 2013 |

Evenement | 84th European Study Group Mathematics with Industry (SWI 2012) - Eindhoven, Nederland Duur: 30 jan 2012 → 3 feb 2012 http://www.maths-in-industry.org/past/ESGI/84/ |

### Congres

Congres | 84th European Study Group Mathematics with Industry (SWI 2012) |
---|---|

Verkorte titel | SWI 2012 |

Land | Nederland |

Stad | Eindhoven |

Periode | 30/01/12 → 3/02/12 |

Ander | 84th European Study Group Mathematics with Industry |

Internet adres |

## Vingerafdruk Duik in de onderzoeksthema's van 'Image recognition of shape defects in hot steel rolling'. Samen vormen ze een unieke vingerafdruk.

## Citeer dit

Balmashnova, E., Bruurmijn, L. C. M., Dissanayake, R., Duits, R., Kampmeijer, L., & Noorden, van, T. L. (2013). Image recognition of shape defects in hot steel rolling. In M. A. A. Boon (editor),

*Proceedings of the 84th European Study Group Mathematics with Industry (SWI 2012)*(blz. 22-38)