Evolutionary RBF classifier for polarimetric SAR images

Authors:
Turker Ince;Serkan Kiranyaz;Moncef Gabbouj
Affiliations:
Izmir University of Economics, Electronics and Telecommunications Engineering Department, Izmir, Turkey;Tampere University of Technology, Department of Signal Processing, Tampere, Finland;Tampere University of Technology, Department of Signal Processing, Tampere, Finland
Venue:
Expert Systems with Applications: An International Journal
Year:
2012

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Abstract

In this paper, a robust radial basis function (RBF) network based classifier is proposed for polarimetric synthetic aperture radar (SAR) images. The proposed feature extraction process utilizes the covariance matrix elements, the H/@a/A decomposition based features combined with the backscattering power (span), and the gray level co-occurrence matrix (GLCM) based texture features, which are projected onto a lower dimensional feature space using principal components analysis. For the classifier training, both conventional backpropagation (BP) and multidimensional particle swarm optimization (MD-PSO) based dynamic clustering are explored. By combining complete polarimetric covariance matrix and eigenvalue decomposition based pixel values with textural information (contrast, correlation, energy, and homogeneity) in the feature set, and employing automated evolutionary RBF classifier for the pattern recognition unit, the overall classification performance is shown to be significantly improved. An experimental study is performed using the fully polarimetric San Francisco Bay and Flevoland data sets acquired by the NASA/Jet Propulsion Laboratory Airborne SAR (AIRSAR) at L-band to evaluate the performance of the proposed classifier. Classification results (in terms of confusion matrix, overall accuracy and classification map) compared with the major state of the art algorithms demonstrate the effectiveness of the proposed RBF network classifier.