高光谱成像
压缩传感
全光谱成像
斑点图案
快照(计算机存储)
波长
光学
计算机科学
光谱成像
物理
人工智能
图像分辨率
材料科学
操作系统
作者
Rebecca French,Sylvain Gigan,Otto L. Muskens
出处
期刊:Optics Express
[The Optical Society]
日期:2018-11-21
卷期号:26 (24): 32302-32302
被引量:15
摘要
Snapshot spectral imaging is rapidly gaining interest for remote sensing applications. Acquiring spatial and spectral data within one image promotes fast measurement times, and reduces the need for stabilized scanning imaging systems. Many current snapshot technologies, which rely on gratings or prisms to characterize wavelength information, are difficult to reduce in size for portable hyperspectral imaging. Here, we show that a multicore multimode fiber can be used as a compact spectral imager with sub-nanometer resolution, by encoding spectral information within a monochrome CMOS camera. We characterize wavelength-dependent speckle patterns for up to 3000 fiber cores over a broad wavelength range. A clustering algorithm is employed in combination with l$_{1}$-minimization to limit data collection at the acquisition stage for the reconstruction of spectral images that are sparse in the wavelength domain. We also show that in the non-compressive regime these techniques are able to accurately reconstruct broadband information.
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