Fig. 1. Scattered photon schematic diagram

Fig. 2. Experimental device diagram of ballistic light extraction based on super continuous illumination and annular space gate^[8]

Fig. 3. SOKG imaging optical path ^[9]

Fig. 4. (a) Non-scattering medium imaging; (b) Imaging through a scattering medium; (c) Traditional optical Kerr gate imaging; (d) SOKG imaging^[9]

Fig. 5. (a1) and (b1) are the initial images; (a2) and (b2) are grayscale images, and the red matrix area is the selected background scattering light area; (a3) and (b3) are the results of the traditional underwater polarization de-scattering method; (a4) and (b4) are the results of the mentioned method^[6]

Fig. 6. Orientation angle of polarization decomposition^[11]

Fig. 7. (a) Comparison of different imaging methods under low concentration and high concentration scattering medium conditions; (b), (c) A local enlarged contrast map of the selected region^[11]

Fig. 8. Optical random corridor speckle correlation imaging process^[13]. (a) Experimental optical path; (b) Subspace reduction process; (c), (f) Speckle correlation; (d), (g) Reconstructed image; (e), (h) Imaging target

Fig. 9. Flow chart of imaging method of research team of Hanjing National University^[15]

Fig. 10. Comparison between (a) array-based imaging system and (b) photon scanning imaging system^[16]

Fig. 11. Point-to-point scanning photon counting imaging^[16]

Fig. 12. The imaging result in the field test scene^[16]

Fig. 13. DOPC system optical path. (a) Wave front measurement; (b) Spatial light modulation^[30]

Fig. 14. Principle optical path diagram of annular interferometer method^[31]

Fig. 15. (a) Conventional imaging method; (b) Computational ghost imaging method

Fig. 16. (a) Non-scattering medium; (b) The scattering medium is located in the emission path; (c) The scattering medium is located in the receiving path; (d) Scattering medium is located in the transmitting path and receiving path^[32]

Fig. 17. Imaging results of different optical paths^[32]

Fig. 18. The underwater computational ghost imaging experimental device with different positions (A, B, C) of the object^[33]

Fig. 19. Simulation of imaging results of the object set in A, B and C positions^[33]

Fig. 20. Imaging results of A, B, C position^[33]

Fig. 21. Verification with scattering simulation data^[34]

Fig. 22. Gaussian blur processing measurement patterns^[34]

Fig. 23. The optimal solution training of imaging parameters^[34]

Fig. 24. Extensible computing ghost imaging system and blurred image training process^[45]

Fig. 25. Interaction process of photons propagating in scattering medium^[45]

Fig. 26. Degradation results of Hadamard matrix after passing through scattering medium^[45]. (a) Hadamard patterns with high energy; (b) Degraded patterns simulated with PCM

Fig. 27. The principle diagram of computational ghost imaging system based on PSF optimization^[46]

Fig. 28. Comparison of the results of Fourier method single pixel imaging and optimized PSF computational ghost imaging method^[46]

Fig. 29. Scattering image reconstruction results under different target backgrounds^[47]

Fig. 30. Scattering imaging results at different distances and different media^[48]

Fig. 31. Comparison of imaging results in the new natural scattering scene^[50]