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Mathematical Problems in Engineering
Volume 2017 (2017), Article ID 4257273, 9 pages
Research Article

Strip Surface Defects Recognition Based on PSO-RS&SOCP-SVM Algorithm

1School of Electronics & Information Engineering, Hebei University of Technology, Tianjin 300401, China
2School of Information Engineering, North China University of Science and Technology, Tangshan, Hebei 063000, China

Correspondence should be addressed to Kewen Xia; nc.ude.tubeh@aixwk

Received 5 September 2016; Revised 5 February 2017; Accepted 21 February 2017; Published 6 March 2017

Academic Editor: Benjamin Ivorra

Copyright © 2017 Dongyan Cui and Kewen Xia. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In order to improve the strip surface defect recognition and classification accuracy and efficiency, Rough Set (RS) attribute reduction algorithm based on Particle Swarm Optimization (PSO) algorithm was used on the optimal selection of strip surface defect image decision features, which removed redundant attributes, provided reduction data for the follow-up Support Vector Machine (SVM) model, reduced vector machine learning time, and constructed the SVM classifier, which uses Second-Order Cone Programming (SOCP) and multikernel Support Vector Machine classification model. Six kinds of typical defects such as rust, scratch, orange peel, bubble, surface crack, and rolled-in scale are recognized and classification is made using this classifier. The experimental results show that the classification accuracy of the proposed algorithm is 99.5%, which is higher than that of SVM algorithm and Relevance Vector Machine (RVM) algorithm. And because of using the Rough Set attribute reduction algorithm based on PSO algorithm, the learning time of SVM is reduced, and the average time of the classification and recognition model is 58.3 ms. In summary, the PSO-RS&SOCP-SVM evaluation model is not only more efficient in time, but also more worthy of popularization and application in the accuracy.