• Photonics Research
  • Vol. 12, Issue 1, 134 (2024)
Yaoming Bian1、2, Fei Wang1, Yuanzhe Wang1、2, Zhenfeng Fu1、2, Haishan Liu1、2, Haiming Yuan1、2, and Guohai Situ1、2、3、*
Author Affiliations
  • 1Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 2Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China
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    DOI: 10.1364/PRJ.503451 Cite this Article Set citation alerts
    Yaoming Bian, Fei Wang, Yuanzhe Wang, Zhenfeng Fu, Haishan Liu, Haiming Yuan, Guohai Situ. Passive imaging through dense scattering media[J]. Photonics Research, 2024, 12(1): 134 Copy Citation Text show less

    Abstract

    Imaging through non-static and optically thick scattering media such as dense fog, heavy smoke, and turbid water is crucial in various applications. However, most existing methods rely on either active and coherent light illumination, or image priors, preventing their application in situations where only passive illumination is possible. In this study we present a universal passive method for imaging through dense scattering media that does not depend on any prior information. Combining the selection of small-angle components out of the incoming information-carrying scattering light and image enhancement algorithm that incorporates time-domain minimum filtering and denoising, we show that the proposed method can dramatically improve the signal-to-interference ratio and contrast of the raw camera image in outfield experiments.
    I(x)=Lρ(x)exp[βd(x)]+L{1exp[βd(x)]},

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    I(x)=J(x)a(x)+A[1a(x)],

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    I(x,t)=J(x)a(x)+A[1a(x)]D(t).

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    SIR=J(x)a(x)A[1a(x)]D(t),

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    I(n)=minpixelwise{Im(n)}*g(w),m=1,,M,

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    I=I0exp(αL),

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    Lo=ln(ε)=ln(II0),

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    V=ln(ε0)α,

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    V=2.996α.

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    Ve=ln(ε0)iαiliL=Lilivi.

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    Yaoming Bian, Fei Wang, Yuanzhe Wang, Zhenfeng Fu, Haishan Liu, Haiming Yuan, Guohai Situ. Passive imaging through dense scattering media[J]. Photonics Research, 2024, 12(1): 134
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