Improving Wishart Classification of Polarimetric SAR Data Using the Hopfield Neural Network Optimization Approach.

Molina Sánchez, Iñigo and Pajares Martinsanz, Gonzalo and López-Martínez, Carlos and Sánchez-Lladó, Francisco Javier (2012). Improving Wishart Classification of Polarimetric SAR Data Using the Hopfield Neural Network Optimization Approach.. "Remote Sensing", v. 4 (n. 11); pp. 3571-3595. ISSN 2072-4292. https://doi.org/10.3390/rs4113571.

Description

Title: Improving Wishart Classification of Polarimetric SAR Data Using the Hopfield Neural Network Optimization Approach.
Author/s:
  • Molina Sánchez, Iñigo
  • Pajares Martinsanz, Gonzalo
  • López-Martínez, Carlos
  • Sánchez-Lladó, Francisco Javier
Item Type: Article
Título de Revista/Publicación: Remote Sensing
Date: November 2012
ISSN: 2072-4292
Volume: 4
Subjects:
Freetext Keywords: Hopfield neural networks; image classification; Polarimetric Synthetic Aperture Radar (PolSAR); Wishart classifier; optimization.
Faculty: E.T.S.I. en Topografía, Geodesia y Cartografía (UPM)
Department: Ingeniería Cartográfica, Geodesia y Fotogrametría [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This paper proposes the optimization relaxation approach based on the analogue Hopfield Neural Network (HNN) for cluster refinement of pre-classified Polarimetric Synthetic Aperture Radar (PolSAR) image data. We consider the initial classification provided by the maximum-likelihood classifier based on the complex Wishart distribution, which is then supplied to the HNN optimization approach. The goal is to improve the classification results obtained by the Wishart approach. The classification improvement is verified by computing a cluster separability coefficient and a measure of homogeneity within the clusters. During the HNN optimization process, for each iteration and for each pixel, two consistency coefficients are computed, taking into account two types of relations between the pixel under consideration and its corresponding neighbors. Based on these coefficients and on the information coming from the pixel itself, the pixel under study is re-classified. Different experiments are carried out to verify that the proposed approach outperforms other strategies, achieving the best results in terms of separability and a trade-off with the homogeneity preserving relevant structures in the image. The performance is also measured in terms of computational central processing unit (CPU) times.

More information

Item ID: 15434
DC Identifier: http://oa.upm.es/15434/
OAI Identifier: oai:oa.upm.es:15434
DOI: 10.3390/rs4113571
Official URL: http://www.mdpi.com/journal/remotesensing
Deposited by: Memoria Investigacion
Deposited on: 08 Oct 2013 15:10
Last Modified: 21 Apr 2016 15:29
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