Precipitates segmentation from scanning electron microscope images through machine learning techniques

Authors:
João P. Papa;Clayton R. Pereira;Victor H. C. de Albuquerque;Cleiton C. Silva;Alexandre X. Falcão;João Manuel R.S. Tavares
Affiliations:
Dep. of Computing, UNESP - Univ Estadual Paulista, Bauru, Brazil;Dep. of Computing, UNESP - Univ Estadual Paulista, Bauru, Brazil;Center of Technological Sciences, University of Fortaleza, Fortaleza, Brazil;Dep. of Materials and Metallurgical Engineering, Federal University of Ceará, Brazil;Institute of Computing, State University of Campinas, Campinas, Brazil;Faculty of Engineering, University of Porto, Porto, Portugal
Venue:
IWCIA'11 Proceedings of the 14th international conference on Combinatorial image analysis
Year:
2011

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Abstract

The presence of precipitates in metallic materials affects its durability, resistance and mechanical properties. Hence, its automatic identification by image processing and machine learning techniques may lead to reliable and efficient assessments on the materials. In this paper, we introduce four widely used supervised pattern recognition techniques to accomplish metallic precipitates segmentation in scanning electron microscope images from dissimilar welding on a Hastelloy C-276 alloy: Support Vector Machines, Optimum-Path Forest, Self Organizing Maps and a Bayesian classifier. Experimental results demonstrated that all classifiers achieved similar recognition rates with good results validated by an expert in metallographic image analysis.