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Chinese Optics Letters, Volume. 23, Issue 8, 081104(2025)

High-resolution non-line-of-sight imaging via polarization differential correlography

Lingfeng Liu1, Shuo Zhu2, Yi Wei1, Jingye Miao1, Wenjun Zhang1, Lianfa Bai1, Enlai Guo1、*, and Jing Han1、**
Author Affiliations
  • 1Jiangsu Key Laboratory of Spectral Imaging and Intelligent Sense, Nanjing University of Science and Technology, Nanjing 210094, China
  • 2Department of Electrical and Electronic Engineering, The University of Hong Kong, Hong Kong, China
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    Schematic of the PDC-NLOS. (a) Imaging process of the PDC-NLOS. (b) Principal diagram of the PDC-NLOS. LP, linear polarization.

    Fig. 1. Schematic of the PDC-NLOS. (a) Imaging process of the PDC-NLOS. (b) Principal diagram of the PDC-NLOS. LP, linear polarization.

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    Curve of the polarization angles to the coherent coefficient between polarized speckles.

    Fig. 2. Curve of the polarization angles to the coherent coefficient between polarized speckles.

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    Experimental setup of the PDC-NLOS. (a) System setup diagram; (b) polarized camera and lens used; (c) DMD used to display objects (light blocking stickers are used in practical experiments to reduce interference due to the front surface of DMD).

    Fig. 3. Experimental setup of the PDC-NLOS. (a) System setup diagram; (b) polarized camera and lens used; (c) DMD used to display objects (light blocking stickers are used in practical experiments to reduce interference due to the front surface of DMD).

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    Experimental results of the PDC-NLOS. (a1)–(a4) Four-polarization-channel intensity images collected by a polarization camera; (b1)–(b4) hidden objects to be detected; (c1)–(c4) autocorrelation estimates; (d1)–(d4) reconstruction results using the HIO algorithm.

    Fig. 4. Experimental results of the PDC-NLOS. (a1)–(a4) Four-polarization-channel intensity images collected by a polarization camera; (b1)–(b4) hidden objects to be detected; (c1)–(c4) autocorrelation estimates; (d1)–(d4) reconstruction results using the HIO algorithm.

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    Resolution test experimental results of the PDC-NLOS. (a) A USAF target; (b1), (b2) autocorrelation estimates of the vertical and horizontal stripes; (c1), (c2) reconstructions using HIO reconstruction; (d) intensity distribution of the power spectrum in the direction perpendicular to the object.

    Fig. 5. Resolution test experimental results of the PDC-NLOS. (a) A USAF target; (b1), (b2) autocorrelation estimates of the vertical and horizontal stripes; (c1), (c2) reconstructions using HIO reconstruction; (d) intensity distribution of the power spectrum in the direction perpendicular to the object.

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    Lingfeng Liu, Shuo Zhu, Yi Wei, Jingye Miao, Wenjun Zhang, Lianfa Bai, Enlai Guo, Jing Han, "High-resolution non-line-of-sight imaging via polarization differential correlography," Chin. Opt. Lett. 23, 081104 (2025)

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    Paper Information

    Category: Imaging Systems and Image Processing

    Received: Feb. 24, 2025

    Accepted: Apr. 18, 2025

    Published Online: Aug. 1, 2025

    The Author Email: Enlai Guo (njustgel@njust.edu.cn), Jing Han (eohj@njust.edu.cn)

    DOI:10.3788/COL202523.081104

    CSTR:32184.14.COL202523.081104

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology