Spatial-spectral dimensionality reduction of hyperspectral imagery with partial knowledge of class labels

Nathan D. Cahill; Selene E. Chew; Paul S. Wenger

doi:10.1117/12.2177139

21 May 2015 Spatial-spectral dimensionality reduction of hyperspectral imagery with partial knowledge of class labels

Nathan D. Cahill, Selene E. Chew, Paul S. Wenger

Proceedings Volume 9472, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXI; 94720S (2015) https://doi.org/10.1117/12.2177139
Event: SPIE Defense + Security, 2015, Baltimore, MD, United States

Abstract

Laplacian Eigenmaps (LE) and Schroedinger Eigenmaps (SE) are effective dimensionality reduction algorithms that are capable of integrating both the spatial and spectral information inherent in a hyperspectral image. In this paper, we consider how to extend LE- and SE-based spatial-spectral dimensionality reduction algorithms to situations where partial knowledge of class labels exists, for example, when a subset of pixels has been manually labeled by an expert user. This partial knowledge is incorporated through the use of cluster potentials, turning each underlying algorithm into an instance of SE. Using publicly available data, we show that incorporating this partial knowledge improves the performance of subsequent classification algorithms.

Citation Download Citation

Nathan D. Cahill, Selene E. Chew, and Paul S. Wenger "Spatial-spectral dimensionality reduction of hyperspectral imagery with partial knowledge of class labels", Proc. SPIE 9472, Algorithms and Technologies for Multispectral, Hyperspectral, and Ultraspectral Imagery XXI, 94720S (21 May 2015); https://doi.org/10.1117/12.2177139

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