Journal
EXPERT SYSTEMS WITH APPLICATIONS
Volume 37, Issue 12, Pages 7606-7614Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eswa.2010.04.082
Keywords
Radiography; Welds; Defects; Segmentation; Classification; Texture; Geometrical features
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In this paper, a method for the detection and classification of defects in weld radiographs is presented. The method has been applied for detecting and discriminating discontinuities in the weld images that may correspond to false alarms or defects such as worm holes, porosity, linear slag inclusion, gas pores, lack of fusion or crack. A set of 43 descriptors corresponding to texture measurements and geometrical features is extracted for each segmented object and given as input to a classifier. The classifier is trained to classify each of the objects it into one of the defect classes or characterize it as non-defect. Three fold cross validation was utilized and experimental results are reported for three different classifiers (Support Vector Machine, Neural Network, k-NN). (C) 2010 Elsevier Ltd. All rights reserved.
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