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arXiv · 2507.08282

MetaH2: A Snapshot Metasurface HDR Hyperspectral Camera

Yuxuan Liu·Qi Guo
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Abstract

We present a metasurface camera that jointly performs high-dynamic range (HDR) and hyperspectral imaging in a snapshot. The system integrates exposure bracketing and computed tomography imaging spectrometry (CTIS) by simultaneously forming multiple spatially multiplexed projections with unique power ratios and chromatic aberrations on a photosensor. The measurements are subsequently processed through a deep reconstruction model to generate an HDR image and a hyperspectral datacube. Our simulation studies show that the proposed system achieves higher reconstruction accuracy than previous snapshot hyperspectral imaging methods on benchmark datasets. We assemble a working prototype and demonstrate snapshot reconstruction of 60 dB dynamic range and 10 nm spectral resolution from 600 nm to 700 nm on real-world scenes from a monochrome photosensor.

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Yuxuan Liu, Qi Guo. 2025-07-11. MetaH2: A Snapshot Metasurface HDR Hyperspectral Camera. https://arxiv.org/abs/2507.08282

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