Fig. 1. Schematic of underwater target laser imaging model

Fig. 2. Flow chart of the MC mode

Fig. 3. Photon number distribution of laser beam

Fig. 4. Schematic of relationship among four coordinates

Fig. 5. Imaging light path of camera

Fig. 6. Schematic of underwater laser imaging system

Fig. 7. Images of simulation and experiment of target region. (a) Water I; (b) water II; (c) water III

Fig. 8. Results of simulation and experiment of entire image. (a)(b) simulation under water I; (c) experiment under water I; (d)(e) simulation under water II; (f) experiment under water II; (g)(h) simulation under water III; (i) experiment under water III

Fig. 9. Ratio of average light intensity of backscattered light to that of target area in areas 2 to 5