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Integrating Contextual Information With H/(alpha)over-bar Decomposition for PolSAR Data Classification
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatics. Natl Univ Def Technol, Peoples R China.
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatics.
2016 (English)In: IEEE Geoscience and Remote Sensing Letters, ISSN 1545-598X, E-ISSN 1558-0571, Vol. 13, no 12, p. 2034-2038Article in journal (Refereed) Published
Abstract [en]

The use of contextual information is beneficial to improve both the accuracy and reliability of image classification. Based on the robust fuzzy c-means (RFCM) clustering method and an adaptive Markov random field model, this letter proposes a contextual H/(alpha) over bar classifier for polarimetric synthetic aperture radar images. At each iterative step of RFCM clustering, the prior probability extracted from the local neighborhood is combined with the fuzzy membership derived from inherent polarimetric characteristics, thus the enhanced fuzzy membership is more reliable. In addition, an adaptive smoothing factor is proposed for use during contextual information retrieval, which can prevent oversmoothing and preserve the local spatial details. The experimental results implemented using AIRSAR and ESAR L-band data validate the efficacy of the proposed method. Compared with the iterated Wishart classifier and fuzzy H/(alpha) over bar classifier, the proposed method significantly improves the classification accuracy, with less noise and increased preservation of details.

Place, publisher, year, edition, pages
IEEE, 2016. Vol. 13, no 12, p. 2034-2038
Keywords [en]
Adaptive Markov random field (AMRF), classification, contextual information, polarimetric synthetic aperture radar (PolSAR)
National Category
Geochemistry
Identifiers
URN: urn:nbn:se:kth:diva-200764DOI: 10.1109/LGRS.2016.2622250ISI: 000391298500057Scopus ID: 2-s2.0-84996844556OAI: oai:DiVA.org:kth-200764DiVA, id: diva2:1072387
Note

QC 20170207

Available from: 2017-02-07 Created: 2017-02-02 Last updated: 2017-05-29Bibliographically approved

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CiteExportLink to record
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  • apa
  • harvard1
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  • modern-language-association-8th-edition
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Language
  • de-DE
  • en-GB
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  • nn-NO
  • nn-NB
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  • Other locale
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Output format
  • html
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  • asciidoc
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