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Proceedings Paper

Fourier methods of improving reconstruction speed for CTIS imaging spectrometers
Author(s): Nathan Hagen; Eustace L. Dereniak; David T. Sass
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Paper Abstract

A persistent barrier to the wider use of the Computed Tomographic Imaging Spectrometer (CTIS) has been the extraordinary demands it places on computational resources. Raw images can be obtained at snapshot speeds, but reconstructed datacubes typically require minutes of reconstruction time each. We present a new approach to the CTIS reconstruction problem which makes use of the spatial shift-invariance in a CTIS system to greatly reduce the dimensionality of the matrix inversion process performed during reconstruction. Preliminary results indicate that a speedup by a factor of 4000 is possible.

Paper Details

Date Published: 12 September 2007
PDF: 11 pages
Proc. SPIE 6661, Imaging Spectrometry XII, 666103 (12 September 2007); doi: 10.1117/12.732669
Show Author Affiliations
Nathan Hagen, College of Optical Sciences, Univ. of Arizona (United States)
Eustace L. Dereniak, College of Optical Sciences, Univ. of Arizona (United States)
David T. Sass, U.S. Army TACOM (United States)

Published in SPIE Proceedings Vol. 6661:
Imaging Spectrometry XII
Sylvia S. Shen; Paul E. Lewis, Editor(s)

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