Fourier methods of improving reconstruction speed for CTIS imaging spectrometers

Nathan Hagen; Eustace L. Dereniak; David T. Sass

doi:10.1117/12.732669

12 September 2007 Fourier methods of improving reconstruction speed for CTIS imaging spectrometers

Nathan Hagen, Eustace L. Dereniak, David T. Sass

Proceedings Volume 6661, Imaging Spectrometry XII; 666103 (2007) https://doi.org/10.1117/12.732669
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

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.

Citation Download Citation

Nathan Hagen, Eustace L. Dereniak, and David T. Sass "Fourier methods of improving reconstruction speed for CTIS imaging spectrometers", Proc. SPIE 6661, Imaging Spectrometry XII, 666103 (12 September 2007); https://doi.org/10.1117/12.732669

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