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		<doi>10.1080/17538947.2018.1474958</doi>
		<issn>1753-8947</issn>
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		<citationkey>NegriFreSilMenDut:2019:ReClPo</citationkey>
		<title>Region-based classification of PolSAR data using radial basis kernel functions with stochastic distances</title>
		<year>2019</year>
		<month>June</month>
		<typeofwork>journal article</typeofwork>
		<secondarytype>PRE PI</secondarytype>
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		<author>Negri, Rogério Galante,</author>
		<author>Frery, Alejandro C.,</author>
		<author>Silva, Wagner B.,</author>
		<author>Mendes, Tatiana Sussel Gonçalves,</author>
		<author>Dutra, Luciano Vieira,</author>
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		<orcid>0000-0002-4808-2362</orcid>
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		<orcid>0000-0002-0421-5311</orcid>
		<orcid>0000-0002-7757-039X</orcid>
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		<group>DIDPI-CGOBT-INPE-MCTIC-GOV-BR</group>
		<affiliation>Universidade Estadual Paulista (UNESP)</affiliation>
		<affiliation>Universidade Federal de Alagoas (UFAL)</affiliation>
		<affiliation>Instituto Militar de Engenharia (IME)</affiliation>
		<affiliation>Universidade Estadual Paulista (UNESP)</affiliation>
		<affiliation>Instituto Nacional de Pesquisas Espaciais (INPE)</affiliation>
		<electronicmailaddress>rogerio.negri@unesp.br</electronicmailaddress>
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		<electronicmailaddress></electronicmailaddress>
		<electronicmailaddress>luciano.dutra@inpe.br</electronicmailaddress>
		<journal>International Journal of Digital Earth</journal>
		<volume>12</volume>
		<number>6</number>
		<pages>699-719</pages>
		<secondarymark>A2_INTERDISCIPLINAR A2_GEOGRAFIA B3_GEOCIÊNCIAS</secondarymark>
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		<contenttype>External Contribution</contenttype>
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		<keywords>PolSAR, image classification, stochastic distance, minimum distance classifier, SVM.</keywords>
		<abstract>Region-based classification of PolSAR data can be effectively performed by seeking for the assignment that minimizes a distance between prototypes and segments. Silva et al. [Classification of segments in PolSAR imagery by minimum stochastic distances between wishart distributions. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 6 (3): 12631273] used stochastic distances between complex multivariate Wishart models which, differently from other measures, are computationally tractable. In this work we assess the robustness of such approach with respect to errors in the training stage, and propose an extension that alleviates such problems. We introduce robustness in the process by incorporating a combination of radial basis kernel functions and stochastic distances with Support Vector Machines (SVM). We consider several stochastic distances between Wishart: Bhatacharyya, Kullback-Leibler, Chi-Square, Rényi, and Hellinger. We perform two case studies with PolSAR images, both simulated and from actual sensors, and different classification scenarios to compare the performance of Minimum Distance and SVM classification frameworks. With this, we model the situation of imperfect training samples. We show that SVM with the proposed kernel functions achieves better performance with respect to Minimum Distance, at the expense of more computational resources and the need of parameter tuning. Code and data are provided for reproducibility.</abstract>
		<area>SRE</area>
		<language>en</language>
		<targetfile>Region based classification of PolSAR data using radial basis kernel functions with stochastic distances.pdf</targetfile>
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