The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
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Articles | Volume XLIII-B3-2020
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2020, 357–362, 2020
https://doi.org/10.5194/isprs-archives-XLIII-B3-2020-357-2020
Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., XLIII-B3-2020, 357–362, 2020
https://doi.org/10.5194/isprs-archives-XLIII-B3-2020-357-2020

  21 Aug 2020

21 Aug 2020

DIMENSIONALITY REDUCTION VIA AN ORTHOGONAL AUTOENCODER APPROACH FOR HYPERSPECTRAL IMAGE CLASSIFICATION

V. H. Ayma1, V. A. Ayma2, and J. Gutierrez1 V. H. Ayma et al.
  • 1University of Lima, 4600 Javier Prado East Ave., Lima, Peru
  • 2Pontifical Catholic University of Peru, 1801 University Ave., Lima, Peru

Keywords: Dimensionality Reduction, Orthogonal Autoencoders, Hyperspectral Imaging

Abstract. Nowadays, the increasing amount of information provided by hyperspectral sensors requires optimal solutions to ease the subsequent analysis of the produced data. A common issue in this matter relates to the hyperspectral data representation for classification tasks. Existing approaches address the data representation problem by performing a dimensionality reduction over the original data. However, mining complementary features that reduce the redundancy from the multiple levels of hyperspectral images remains challenging. Thus, exploiting the representation power of neural networks based techniques becomes an attractive alternative in this matter. In this work, we propose a novel dimensionality reduction implementation for hyperspectral imaging based on autoencoders, ensuring the orthogonality among features to reduce the redundancy in hyperspectral data. The experiments conducted on the Pavia University, the Kennedy Space Center, and Botswana hyperspectral datasets evidence such representation power of our approach, leading to better classification performances compared to traditional hyperspectral dimensionality reduction algorithms.