• Advanced Photonics Nexus
  • Vol. 2, Issue 2, 026008 (2023)
Shigekazu Takizawa1, Kotaro Hiramatsu1、2、*, Matthew Lindley1, Julia Gala de Pablo1, Shunsuke Ono3, and Keisuke Goda1、4、5
Author Affiliations
  • 1The University of Tokyo, Department of Chemistry, Tokyo, Japan
  • 2The University of Tokyo, Research Center for Spectrochemistry, Tokyo, Japan
  • 3Tokyo Institute of Technology, School of Computing, Department of Computer Science, Tokyo, Japan
  • 4University of California, Department of Bioengineering, Los Angeles, California, United States
  • 5Wuhan University, Institute of Technological Sciences, Wuhan, China
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    DOI: 10.1117/1.APN.2.2.026008 Cite this Article Set citation alerts
    Shigekazu Takizawa, Kotaro Hiramatsu, Matthew Lindley, Julia Gala de Pablo, Shunsuke Ono, Keisuke Goda. High-speed hyperspectral imaging enabled by compressed sensing in time domain[J]. Advanced Photonics Nexus, 2023, 2(2): 026008 Copy Citation Text show less

    Abstract

    Hyperspectral imaging (HSI) is a powerful tool widely used for various scientific and industrial applications due to its ability to provide rich spatiospectral information. However, in exchange for multiplex spectral information, its image acquisition rate is lower than that of conventional imaging, with up to a few colors. In particular, HSI in the infrared region and using nonlinear optical processes is impractically slow because the three-dimensional (3D) data cube must be scanned in a point-by-point manner. In this study, we demonstrate a framework to improve the spectral image acquisition rate of HSI by integrating time-domain HSI and compressed sensing. Specifically, we simulated broadband coherent Raman imaging at a record high frame rate of 25 frames per second (fps) with 100 pixels × 100 pixels, which is 10 × faster than that of previous work, based on an experimentally feasible sampling scheme utilizing 3D Lissajous scanning.
    u^=argminuCN{Re[Wu]f22+λ(DxDbu1+DyDbu1)},

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    minu{f(u)+g(u)+h(Gu)},

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    {u(k+1)=proxγ1g{u(k)γ1[f(u(k))+GTv(k)]}v(k+1)=proxγ2h*{v(k)+γ2G[2u(k+1)u(k)]},

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    {u(k+1)=u(k)γ1[WH(Re[Wu(k)]f)+DbTDTv(k)](v)(k)=v(k)+γ2DDb[2u(k+1)u(k)]v(k+1)=(v)(k)γ2Sλ/γ2[(v)(k)/γ2],

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    Shigekazu Takizawa, Kotaro Hiramatsu, Matthew Lindley, Julia Gala de Pablo, Shunsuke Ono, Keisuke Goda. High-speed hyperspectral imaging enabled by compressed sensing in time domain[J]. Advanced Photonics Nexus, 2023, 2(2): 026008
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