Compressive Hyperspectral Imaging in the Molecular Fingerprint Band
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Version 3 2022-05-05, 22:23
Version 2 2022-05-05, 21:42
Version 1 2022-05-05, 21:42
Posted on 2022-09-14 - 15:55
Spectrally-resolved imaging provides a spectrum for each pixel of an image which, in the mid-infrared, can enable its chemical composition to be mapped by exploiting the correlation between spectroscopic features and specific molecular groups. The compatibility of Fourier-transform interferometry with full-field imaging makes it the spectroscopic method of choice, but Nyquist-limited fringe sampling restricts the increments of the interferometer arm length to no more than a few microns, making the acquisition time-consuming. Here, we demonstrate a compressive hyperspectral imaging strategy that combines non-uniform sampling and a smoothness-promoting prior to acquire data at 15% of the Nyquist rate, providing a significant acquisition-rate improvement over state-of-the-art techniques. By illuminating test objects with a sequence of suitably designed light spectra, we demonstrate compressive hyperspectral imaging across the 700–1400 cm-1 region in transmission mode. A post-processing analysis of the resulting hyperspectral images shows the potential of the method for efficient non-destructive classification of different materials on painted cultural heritage.
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Charsley, Jake; Rutkauskas, Marius; Altmann, Yoann; Risdonne, Valentina; Botticelli, Michela; Smith, Margaret; et al. (2022). Compressive Hyperspectral Imaging in the Molecular Fingerprint Band. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.5898476.v4
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AUTHORS (8)
JC
Jake Charsley
MR
Marius Rutkauskas
YA
Yoann Altmann
VR
Valentina Risdonne
MB
Michela Botticelli
MS
Margaret Smith
CY
Christina Young
DR
Derryck Reid