Superpixels meet essential spectra for fast Raman hyperspectral microimaging - Signal et Communications Access content directly
Journal Articles Optics Express Year : 2023

Superpixels meet essential spectra for fast Raman hyperspectral microimaging

Matthieu Loumaigne

Abstract

In the context of spectral unmixing, essential information corresponds to the most linearly dissimilar rows and/or columns of a two-way data matrix which are indispensable to reproduce the full data matrix in a convex linear way. Essential information has recently been shown accessible on-the-fly via a decomposition of the measured spectra in the Fourier domain and has opened new perspectives for fast Raman hyperspectral microimaging. In addition, when some spatial prior is available about the sample, such as the existence of homogeneous objects in the image, further acceleration for the data acquisition procedure can be achieved by using superpixels. The expected gain in acquisition time is shown to be around three order of magnitude on simulated and real data with very limited distortions of the estimated spectrum of each object composing the images.
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Dates and versions

hal-04409250 , version 1 (22-01-2024)

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Valentin Gilet, Guillaume Mabilleau, Matthieu Loumaigne, Laureen Coic, Raffaele Vitale, et al.. Superpixels meet essential spectra for fast Raman hyperspectral microimaging. Optics Express, 2023, 32 (1), pp.932. ⟨10.1364/OE.509736⟩. ⟨hal-04409250⟩
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