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Spectral-spatial Classification of Hyperspectral Images Using Signal Subspace Identification and Edge-preserving Filter

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Abstract

Hyperspectral images in remote sensing include hundreds of spectral bands that provide valuable information for accurately identify objects. In this paper, a new method of classifying hyperspectral images using spectral spatial information has been presented. Here, using the hyperspectral signal subspace identification (HYSIME) method which estimates the signal and noise correlation matrix and selects a subset of eigenvalues for the best representation of the signal subspace in order to minimize the mean square error, subsets from the main sample space have been extracted. After subspace extraction with the help of the HYSIME method, the edge-preserving filtering (EPF), and classification of the hyperspectral subspace using a support vector machine (SVM), results were then merged into the decision-making level using majority rule to create the spectral-spatial classifier. The simulation results showed that the spectral-spatial classifier presented leads to significant improvement in the accuracy and validity of the classification of Indiana, Pavia and Salinas hyperspectral images, such that it can classify these images with 98.79%, 98.88% and 97.31% accuracy, respectively.

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Authors and Affiliations

Authors

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Correspondence to Fereshteh Poorahangaryan.

Additional information

Recommended by Associate Editor De Xu

Negin Alborzi received the B. Eng. degree in computer engineering from Ayandegan Institute of Higher Education in Tonekabon, Iran in 2016. She is currently a Master student in information technology at Department of Computer Engineering Faculty of Electrical and Computer Engineering, Ayandegan Institute of Higher Education in Tonekabon, Iran.

Her research interest is data mining.

Fereshteh Poorahangaryan received the B. Eng. degree in electronics engineering from Amirkabir University, Iran in 2006, and the M. Eng. degree in electronics engineering from Guilan University, Iran in 2009. She received the Ph. D. degree in electronics engineering from the Science and Research Branch of Islamic Azad University, Iran in 2017.

Her research interests include image processing, computer vision, and medical image analysis.

Homayoun Beheshti received the B. Eng. degree in computer engineering from North University, Iran in 2004, and the M. Eng. degree in network engineering from Sharif University of Technology, Iran in 2010. He is currently a Ph. D. degree candidate at Islamic Azad University, Iran.

His research interests include natural language processing (NLP) and data mining.

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Alborzi, N., Poorahangaryan, F. & Beheshti, H. Spectral-spatial Classification of Hyperspectral Images Using Signal Subspace Identification and Edge-preserving Filter. Int. J. Autom. Comput. 17, 222–232 (2020). https://doi.org/10.1007/s11633-019-1188-5

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