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A speckle-based approach to compressive hyperspectral imaging

A speckle-based approach to compressive hyperspectral imaging
A speckle-based approach to compressive hyperspectral imaging

Incorporating wavelength information into a monochrome image is of great interest for imaging spectroscopy. Here, we show that by exploiting the properties of multiple scattering materials, we can encode spectral information in a CMOS image, where the spectral resolution obtained is only limited by the scattering strength of the material. As a proof-of-concept, we demonstrate this technique using a thin multiple scattering layer of gallium phosphide nanowires and a microlens array. We achieve a spectral resolution of approximately 4 nm and a reconstructed image containing 64 pixels. We demonstrate that a computational technique which is commonly used in compressive sensing can be used to reconstruct both sparse and dense spectra, when undersampling and oversampling a signal, respectively. This method provides an ultra-compact solution to obtaining both spatial and spectral information in one measurement, for potential use in portable spectroscopy.

compressive sensing, hyperspectral imaging, multiple scattering, speckle
1-8
SPIE
French, Rebecca
d6d6a85a-e351-4cc8-ae4a-827c35fe6b64
Gigan, Sylvain
f2f2026a-fbe0-4fbe-b3a1-d8f7b35cdd58
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
French, Rebecca
d6d6a85a-e351-4cc8-ae4a-827c35fe6b64
Gigan, Sylvain
f2f2026a-fbe0-4fbe-b3a1-d8f7b35cdd58
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9

French, Rebecca, Gigan, Sylvain and Muskens, Otto L. (2018) A speckle-based approach to compressive hyperspectral imaging. In Next-Generation Spectroscopic Technologies XI. vol. 10657, SPIE. pp. 1-8 . (doi:10.1117/12.2303993).

Record type: Conference or Workshop Item (Paper)

Abstract

Incorporating wavelength information into a monochrome image is of great interest for imaging spectroscopy. Here, we show that by exploiting the properties of multiple scattering materials, we can encode spectral information in a CMOS image, where the spectral resolution obtained is only limited by the scattering strength of the material. As a proof-of-concept, we demonstrate this technique using a thin multiple scattering layer of gallium phosphide nanowires and a microlens array. We achieve a spectral resolution of approximately 4 nm and a reconstructed image containing 64 pixels. We demonstrate that a computational technique which is commonly used in compressive sensing can be used to reconstruct both sparse and dense spectra, when undersampling and oversampling a signal, respectively. This method provides an ultra-compact solution to obtaining both spatial and spectral information in one measurement, for potential use in portable spectroscopy.

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More information

e-pub ahead of print date: 14 May 2018
Venue - Dates: Next-Generation Spectroscopic Technologies XI 2018, Orlando, United States, 2018-04-16 - 2018-04-18
Keywords: compressive sensing, hyperspectral imaging, multiple scattering, speckle

Identifiers

Local EPrints ID: 422926
URI: http://eprints.soton.ac.uk/id/eprint/422926
PURE UUID: 607207a5-2dbd-419b-be9a-e871008ae8c5
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

Catalogue record

Date deposited: 08 Aug 2018 16:30
Last modified: 20 Jul 2019 00:48

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