Particle Swarms for Feature Extraction of Hyperspectral Data

Sildomar Takahashi MONTEIRO  Yukio KOSUGI  

IEICE TRANSACTIONS on Information and Systems   Vol.E90-D   No.7   pp.1038-1046
Publication Date: 2007/07/01
Online ISSN: 1745-1361
DOI: 10.1093/ietisy/e90-d.7.1038
Print ISSN: 0916-8532
Type of Manuscript: PAPER
Category: Pattern Recognition
feature extraction,  particle swarm optimization,  hyperspectral data,  neural networks,  principal components analysis,  

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This paper presents a novel feature extraction algorithm based on particle swarms for processing hyperspectral imagery data. Particle swarm optimization, originally developed for global optimization over continuous spaces, is extended to deal with the problem of feature extraction. A formulation utilizing two swarms of particles was developed to optimize simultaneously a desired performance criterion and the number of selected features. Candidate feature sets were evaluated on a regression problem. Artificial neural networks were trained to construct linear and nonlinear models of chemical concentration of glucose in soybean crops. Experimental results utilizing real-world hyperspectral datasets demonstrate the viability of the method. The particle swarms-based approach presented superior performance in comparison with conventional feature extraction methods, on both linear and nonlinear models.