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Optimized coded aperture for frugal hyperspectral image recovery using a dual-disperser system

Elizabeth Hemsley 1 Ibrahim Ardi 2, 1 Simon Lacroix 3 Hervé Carfantan 2 Antoine Monmayrant 1
1 LAAS-PHOTO - Équipe Photonique
LAAS - Laboratoire d'analyse et d'architecture des systèmes
3 LAAS-RIS - Équipe Robotique et InteractionS
LAAS - Laboratoire d'analyse et d'architecture des systèmes
Abstract : We present a novel acquisition scheme based on a dual disperser architecture, which can reconstruct a hyperspectral data cube using many times fewer acquisitions than spectral bands. The reconstruction algorithm follows a quadratic regularization approach, based on the assumption that adjacent pixels in the scene share similar spectra, and if they do not, this corresponds to an edge which is detectable on the panchromatic image. A digital micro-mirror device (DMD) applies reconfigurable spectral-spatial filtering to the scene for each acquisition, and the filtering code is optimized considering the physical properties of the system. The algorithm is tested on simple multi-spectral scenes with 110 wavelength bands, and is able to accurately reconstruct the hyperspectral datacube using only 10 acquisitions.
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https://hal.laas.fr/hal-02993037
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Submitted on : Friday, November 6, 2020 - 4:04:07 PM
Last modification on : Thursday, November 19, 2020 - 4:36:07 PM

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Elizabeth Hemsley, Ibrahim Ardi, Simon Lacroix, Hervé Carfantan, Antoine Monmayrant. Optimized coded aperture for frugal hyperspectral image recovery using a dual-disperser system. Journal of the Optical Society of America. A, Optics and image science, Optical Society of America, In press, 37 (12), pp.1916-1926. ⟨10.1364/JOSAA.403594⟩. ⟨hal-02993037⟩

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