Linear unmixing based feature extraction for hyperspectral data in a high performance computing environment

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Most hyperspectral processing techniques suffer from high execution times. They are iterative with each step's complexity dependent on the size of the data. As the size of the data continues to increase the computational cost to process will only go up. In this paper a new group of distributed algorithms for linear unmixing is introduced. The approach employs parallelization of recent techniques such as Nonnegative Matrix Factorization. A theoretical introduction to NMF is presented and its computational costs are discussed. Next the design of parallel algorithms that minimize the data distribution and communication overhead is shown. The experimental results support the claim that the distributed algorithms provide a significant computational compared to their sequential counterparts.

Original languageEnglish
Title of host publicationImaging Spectrometry XVII
DOIs
StatePublished - 1 Dec 2012
EventImaging Spectrometry XVII - San Diego, CA, United States
Duration: 13 Aug 201214 Aug 2012

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8515
ISSN (Print)0277-786X

Other

OtherImaging Spectrometry XVII
CountryUnited States
CitySan Diego, CA
Period13/08/1214/08/12

Fingerprint

Hyperspectral Data
Distributed Algorithms
Parallel algorithms
pattern recognition
Feature Extraction
Feature extraction
Computational Cost
High Performance
Non-negative Matrix Factorization
Computing
Data Communication
Data Distribution
Parallelization
Parallel Algorithms
Execution Time
costs
Continue
Factorization
Minimise
factorization

Keywords

  • Computer clusters
  • Distributed computing
  • Hyperspectral data
  • Linear unmixing
  • Nonnegative matrix factorization

Cite this

Robila, S. A. (2012). Linear unmixing based feature extraction for hyperspectral data in a high performance computing environment. In Imaging Spectrometry XVII [85150M] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8515). https://doi.org/10.1117/12.928666
Robila, Stefan A. / Linear unmixing based feature extraction for hyperspectral data in a high performance computing environment. Imaging Spectrometry XVII. 2012. (Proceedings of SPIE - The International Society for Optical Engineering).
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Robila, SA 2012, Linear unmixing based feature extraction for hyperspectral data in a high performance computing environment. in Imaging Spectrometry XVII., 85150M, Proceedings of SPIE - The International Society for Optical Engineering, vol. 8515, Imaging Spectrometry XVII, San Diego, CA, United States, 13/08/12. https://doi.org/10.1117/12.928666

Linear unmixing based feature extraction for hyperspectral data in a high performance computing environment. / Robila, Stefan A.

Imaging Spectrometry XVII. 2012. 85150M (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 8515).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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N2 - Most hyperspectral processing techniques suffer from high execution times. They are iterative with each step's complexity dependent on the size of the data. As the size of the data continues to increase the computational cost to process will only go up. In this paper a new group of distributed algorithms for linear unmixing is introduced. The approach employs parallelization of recent techniques such as Nonnegative Matrix Factorization. A theoretical introduction to NMF is presented and its computational costs are discussed. Next the design of parallel algorithms that minimize the data distribution and communication overhead is shown. The experimental results support the claim that the distributed algorithms provide a significant computational compared to their sequential counterparts.

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Robila SA. Linear unmixing based feature extraction for hyperspectral data in a high performance computing environment. In Imaging Spectrometry XVII. 2012. 85150M. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.928666