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Adaptation of an Iterative PCA to a Manycore Architecture for Hyperspectral Image Processing

Journal of Signal Processing Systems volume 91, pages 759–771 (2019)Cite this article

Abstract

This paper presents a study of the adaptation of a Non-Linear Iterative Partial Least Squares (NIPALS) algorithm applied to Hyperspectral Imaging to a Massively Parallel Processor Array manycore architecture, which assembles 256 cores distributed over 16 clusters. This work aims at optimizing the internal communications of the platform to achieve real-time processing of large data volumes with limited computational resources and memory bandwidth. As hyperspectral images are composed of extensive volumes of spectral information, real-time requirements, which are upper-bounded by the image capture rate of the hyperspectral sensor, are a challenging objective. To address this issue, the image size is usually reduced prior to the processing phase, which is itself a computationally intensive task. Consequently, this paper proposes an analysis of the intrinsic parallelism and the data dependency within the NIPALS algorithm and its subsequent implementation on a manycore architecture. Furthermore, this implementation has been validated against three hyperspectral images extracted from both remote sensing and medical datasets. As a result, an average speedup of 17× has been achieved when compared to the sequential version. Finally, this approach has been compared with other state-of-the-art implementations, outperforming them in terms of performance.

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Notes

  1. http://aviris.jpl.nasa.gov

  2. http://speclab.cr.usgs.gov/wtc

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Acknowledgements

This research has been funded by the EU FET HELICoiD (HypErspectraL Imaging Cancer Detection) project (FP7-ICT-2013.9.2 (FET Open) 618080).

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Authors and Affiliations

  1. Centre of Software Technologies and Multimedia Systems (CITSEM), Universidad Politecnica de Madrid (UPM), Madrid, Spain

    R. Lazcano, D. Madroñal, R. Salvador, E. Juarez & C. Sanz

  2. Research Institute for Applied Microelectronics (IUMA), University of Las Palmas de Gran Canaria (ULPGC), Las Palmas de Gran Canaria, Spain

    H. Fabelo, S. Ortega & G. M. Callico

Authors
  1. R. Lazcano
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  2. D. Madroñal
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  3. H. Fabelo
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  4. S. Ortega
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  5. R. Salvador
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  6. G. M. Callico
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  7. E. Juarez
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  8. C. Sanz
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Correspondence to R. Lazcano.

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Lazcano, R., Madroñal, D., Fabelo, H. et al. Adaptation of an Iterative PCA to a Manycore Architecture for Hyperspectral Image Processing. J Sign Process Syst 91, 759–771 (2019). https://doi.org/10.1007/s11265-018-1380-9

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  • DOI: https://doi.org/10.1007/s11265-018-1380-9

Keywords

  • NIPALS-PCA
  • Hyperspectral imaging
  • Massively parallel processing
  • Real-time processing
  • Parallel programming