用超表面实现一次成像的高动态范围与高光谱成像。
MetaH2: A Snapshot Metasurface HDR Hyperspectral Camera
- 通过超表面同时生成多幅不同曝光的图像，实现快速采集。
- 实测可实现60 dB动态范围和10 nm光谱分辨率。
- 适合需要紧凑型、快速成像的遥感与工业检测场景。
我们提出一种超表面相机，能够一次性完成高动态范围（HDR）与高光谱成像。系统通过超表面在感光芯片上同时生成具有独特功率比和色差的空间复用投影，结合曝光分档与计算断层光谱成像（CTIS）技术。随后利用深度重建模型恢复出HDR图像与高光谱数据立方体。仿真结果显示，该方法在基准数据集上的重建精度优于以往的快照式高光谱成像方法。我们搭建了原型机，在真实场景中实现了从600 nm到700 nm波段内10 nm光谱分辨率、60 dB动态范围的快照式成像，仅使用单个黑白传感器。
原文摘要 · Abstract (English)
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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