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NON-STATIONARY HYPERSPECTRAL FORWARD MODEL AND HIGH-RESOLUTION

Abstract : We present in this work a forward model for an Integral Field Unit (IFU) instrument. Our model is general but primarily developed for the Mid Resolution Spectrometer of the Mid In-frared Instrument on board the James Webb Space Telescope (JWST). It takes a 3D spatio-spectral object as input and produces a set of 2D projected data with multiple detectors of different characteristics. However, these 2D outputs suffer from non-stationary spatial and spectral blurring, as well as under-sampling. Our first contribution is the development of the forward model in order to simulate data and the second is the use of this model to reconstruct a full 3D hyperspectral image from the projected measurements. This problem is ill-posed and we propose an algorithm based on the regularized least-square approach with convex edge-preserving regularization. We show on the simulation that our proposed model and algorithm allow a better reconstruction than the state of the art algorithm, thanks to spatial and spectral deconvolutions and denoising.
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https://hal.archives-ouvertes.fr/hal-02773302
Contributor : François Orieux <>
Submitted on : Thursday, June 4, 2020 - 1:22:55 PM
Last modification on : Thursday, May 27, 2021 - 10:34:36 AM
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  • HAL Id : hal-02773302, version 1

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Ralph Abi-Rizk, François Orieux, Alain Abergel. NON-STATIONARY HYPERSPECTRAL FORWARD MODEL AND HIGH-RESOLUTION. IEEE International Conference on Image Processing 2020 (ICIP 2020), Oct 2020, Abu-Dhabi, United Arab Emirates. ⟨hal-02773302⟩

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