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Proceedings Paper

Parallel hyperspectral image reconstruction using random projections
Author(s): Jorge Sevilla; Gabriel Martín; José M. P. Nascimento
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Paper Abstract

Spaceborne sensors systems are characterized by scarce onboard computing and storage resources and by communication links with reduced bandwidth. Random projections techniques have been demonstrated as an effective and very light way to reduce the number of measurements in hyperspectral data, thus, the data to be transmitted to the Earth station is reduced. However, the reconstruction of the original data from the random projections may be computationally expensive. SpeCA is a blind hyperspectral reconstruction technique that exploits the fact that hyperspectral vectors often belong to a low dimensional subspace. SpeCA has shown promising results in the task of recovering hyperspectral data from a reduced number of random measurements. In this manuscript we focus on the implementation of the SpeCA algorithm for graphics processing units (GPU) using the compute unified device architecture (CUDA).

Experimental results conducted using synthetic and real hyperspectral datasets on the GPU architecture by NVIDIA: GeForce GTX 980, reveal that the use of GPUs can provide real-time reconstruction. The achieved speedup is up to 22 times when compared with the processing time of SpeCA running on one core of the Intel i7-4790K CPU (3.4GHz), with 32 Gbyte memory.

Paper Details

Date Published: 24 October 2016
PDF: 9 pages
Proc. SPIE 10007, High-Performance Computing in Geoscience and Remote Sensing VI, 1000707 (24 October 2016); doi: 10.1117/12.2241252
Show Author Affiliations
Jorge Sevilla, Instituto de Telecomunicações (Portugal)
Lab. of Instrumentation and Experimental Particle Physics (Portugal)
Gabriel Martín, Instituto de Telecomunicações (Portugal)
José M. P. Nascimento, Instituto de Telecomunicações (Portugal)
Instituto Superior de Engenharia de Lisboa (Portugal)

Published in SPIE Proceedings Vol. 10007:
High-Performance Computing in Geoscience and Remote Sensing VI
Bormin Huang; Sebastián López; Zhensen Wu; Jose M. Nascimento; Jun Li; Valeriy V. Strotov, Editor(s)

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