?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.relation=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F661%2F&rft.title=Image+Recognition+of+Shape+Defects+in+Hot+Steel+Rolling&rft.creator=Balmashnova%2C+E.&rft.creator=Bruurmijn%2C+M.&rft.creator=Dissanayake%2C+R.&rft.creator=Duits%2C+R.&rft.creator=Kampmeijer%2C+L.&rft.creator=van+Noorden%2C+T.&rft.subject=Materials&rft.subject=None%2FOther&rft.subject=Data+processing&rft.description=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%2C+a+localized+Fourier+transform%2C+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%2C+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+non-pinched+strips.+These+promising+results+open+the+way+for+the+development+of+an+automatic+pinch+detection+system.&rft.date=2012&rft.type=Study+Group+Report&rft.type=NonPeerReviewed&rft.format=application%2Fpdf&rft.language=en&rft.identifier=http%3A%2F%2Fmiis.maths.ox.ac.uk%2Fmiis%2F661%2F1%2Fp2.pdf&rft.identifier=++Balmashnova%2C+E.+and+Bruurmijn%2C+M.+and+Dissanayake%2C+R.+and+Duits%2C+R.+and+Kampmeijer%2C+L.+and+van+Noorden%2C+T.++(2012)+Image+Recognition+of+Shape+Defects+in+Hot+Steel+Rolling.++%5BStudy+Group+Report%5D+++++