http://dx.doi.org/10.1364/AO.54.000D91">
 

Document Type

Journal Article

Department/Unit

Department of Physics

Title

GPU accelerated parallel FFT processing for Fourier transform hyperspectral imaging

Language

English

Abstract

© 2015 Optical Society of America. Sequentially processing massive 1D fast Fourier transformations (FFT) on raw interferograms using a CPU has limited the speed of conventional Fourier transform imaging spectrometers (FTIS). This paper reports the implementation of highly paralleled FFT computation using a low-end graphics processing unit (GPU) device for acceleration of this process. Comparison experiment results have demonstrated ∼10-30 times acceleration improvement using GPU-based parallel processing over conventional CPU-based serial processing upon the input data with same sizes: GPU processing time of only 630 and 173 ms of datacubes with 512 × 512 × 1024 and 64 × 64 × 16 k pixels, respectively, has presented its potential for online and even real-time FTIS raw data processing. The addition of a cheap GPU device into any FTIS system involves no optical modifications, so it is a highly cost-effective technique for temporal resolution enhancement of FTIS-based hyperspectral imaging applications.

Publication Date

2015

Source Publication Title

Applied Optics

Volume

54

Issue

13

Start Page

D91

End Page

D98

Publisher

Optical Society of America

ISSN (print)

1559128X

ISSN (electronic)

21553165

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