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The Journal of Supercomputing

, Volume 75, Issue 3, pp 1565–1579 | Cite as

Extended attribute profiles on GPU applied to hyperspectral image classification

  • Pedro G. Bascoy
  • Pablo Quesada-Barriuso
  • Dora B. HerasEmail author
  • Francisco Argüello
  • Begüm Demir
  • Lorenzo Bruzzone
Article
  • 92 Downloads

Abstract

Extended profiles are an important technique for modelling the spatial information of hyperspectral images at different levels of detail. They are used extensively as a preprocessing stage, especially in classification schemes. In particular, attribute profiles, based on the application of morphological attribute filters to the connected components of the image, have been shown to provide very good results. In this paper we present a parallel implementation of the attribute profiles in CUDA for multispectral and hyperspectral imagery considering the attributes area and standard deviation. The profile computation is based on the max-tree approach but without building the tree itself. Instead, a matrix-based data structure is used along with a recursive flooding (component merging) and filter process. Additionally, a previous feature extraction stage based on wavelets is applied to the hyperspectral image in order to extract the most valuable spectral information, reducing the size of the resulting profile. This scheme efficiently exploits the thousands of available threads on the GPU, obtaining a considerable reduction in execution time as compared to the OpenMP CPU implementation.

Keywords

Remote sensing Hyperspectral Attribute profiles Supervised classification Real-time GPU 

Notes

Acknowledgements

This work was supported in part by the Consellería de Cultura, Educación e Ordenación Universitaria [Grant numbers GRC2014/008 and ED431G/08] and Ministry of Education, Culture and Sport, Government of Spain [Grant number TIN2016-76373-P]. Both are co-funded by the European Regional Development Fund (ERDF).

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Pedro G. Bascoy
    • 1
  • Pablo Quesada-Barriuso
    • 1
  • Dora B. Heras
    • 1
    Email author
  • Francisco Argüello
    • 1
  • Begüm Demir
    • 2
  • Lorenzo Bruzzone
    • 3
  1. 1.Centro Singular de Investigación en Tecnoloxías da Información (CiTIUS)Universidade de Santiago de CompostelaSantiago de CompostelaSpain
  2. 2.Faculty of Electrical Engineering and Computer ScienceTechnische Universität BerlinBerlinGermany
  3. 3.Department of Information Engineering and Computer ScienceUniversity of TrentoTrentoItaly

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