Fig. 1. Underwater signal transmission model

Fig. 2. Overall flow chart of under-water polarization image restoration algorithm

Fig. 3. Schematic diagram of underwater active illumination imaging devices

Fig. 4. Photo of underwater active illumination imaging devices

Fig. 5. Comparison of DOP image effects under unpolarized active illumination and polarized active illumination conditions

Fig. 6. Comparison of recovery results of different targets in low-concentration turbid water

Fig. 7. Comparison of spatial distribution of grayscale values between original image and target detail image of proposed method

Fig. 8. Comparison of recovery results of different targets in high-concentration turbid water

Fig. 9. Grayscale spatial projection comparison of local magnified images of restoration results under high-concentration turbid water

Fig. 10. Comparison of image restoration results at different distances in simulated real water environment

Fig. 11. Ablation experiment analysis of transmittance limitation correction