NDLI: A semisupervised contextual classification algorithm for multitemporal polarimetric SAR data

Content Provider	IEEE Xplore Digital Library
Author	Xin Niu Yifang Ban
Copyright Year	2012
Description	Author affiliation: KTH-Royal Institute of Technology, Stockholm, Sweden (Xin Niu; Yifang Ban)
Abstract	This paper presents a contextual classification algorithm which employs the multiscale modified Pappas adaptive clustering (MPAC) approach and the Semisupervised Expectation-Maximization (SEM) procedure for urban land cover mapping using multitemporal polarimetric SAR (PolSAR) data. The proposed pixel-based algorithm explores spatio-temporal contextual information and thus could effectively improve the classification accuracy while simultaneously avoids the pepper-salt results which often occurs on the SAR images. Moreover, owing to the multiscale analysis, MPAC could adaptively preserve the detailed features comparing with other non-adaptive contextual methods. The proposed algorithm is computationally efficient and requires less parameter to be estimated. Properties of the proposed algorithm including the MRF impact, multiscale efficiency, computational performance and the initialization influence were investigated. Six-date RADARSAT-2 polarimetric SAR data over the Greater Toronto Area were used for validation. The results show that this algorithm could generate homogenous and detailed mapping results with fair accuracy for complex urban land cover classification.
Starting Page	1777
Ending Page	1780
File Size	220431
Page Count	4
File Format	PDF
ISBN	9781467311601
ISSN	21536996
e-ISBN	9781467311595
e-ISBN	9781467311588
DOI	10.1109/IGARSS.2012.6351171
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-22
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Classification algorithms Synthetic aperture radar Covariance matrix Algorithm design and analysis Accuracy Remote sensing Signal processing algorithms Polarimetric SAR Urban mapping MPAC SEM
Content Type	Text
Resource Type	Article

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