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A New Self-Training-Based Unsupervised Satellite Image Classification Technique Using Cluster Ensemble Strategy

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Title A New Self-Training-Based Unsupervised Satellite Image Classification Technique Using Cluster Ensemble Strategy
 
Creator BANERJEE, B
BOVOLO, F
BHATTACHARYA, A
BRUZZONE, L
CHAUDHURI, S
MOHAN, BK
 
Subject REMOTE-SENSING IMAGES
Clustering
ensemble learning
image segmentation
 
Description This letter addresses the problem of unsupervised land-cover classification of remotely sensed multispectral satellite images from the perspective of cluster ensembles and self-learning. The cluster ensembles combine multiple data partitions generated by different clustering algorithms into a single robust solution. A cluster-ensemble-based method is proposed here for the initialization of the unsupervised iterative expectation-maximization (EM) algorithm which eventually produces a better approximation of the cluster parameters considering a certain statistical model is followed to fit the data. The method assumes that the number of land-cover classes is known. A novel method for generating a consistent labeling scheme for each clustering of the consensus is introduced for cluster ensembles. A maximum likelihood classifier is henceforth trained on the updated parameter set obtained from the EM step and is further used to classify the rest of the image pixels. The self-learning classifier, although trained without any external supervision, reduces the effect of data overlapping from different clusters which otherwise a single clustering algorithm fails to identify. The clustering performance of the proposed method on a medium resolution and a very high spatial resolution image have effectively outperformed the results of the individual clustering of the ensemble.
 
Publisher IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
 
Date 2016-01-15T09:01:49Z
2016-01-15T09:01:49Z
2015
 
Type Article
 
Identifier IEEE GEOSCIENCE AND REMOTE SENSING LETTERS, 12(4)741-745
1545-598X
1558-0571
http://dx.doi.org/10.1109/LGRS.2014.2360833
http://dspace.library.iitb.ac.in/jspui/handle/100/18226
 
Language en