Fig. 1. Underwater optical imaging model

Fig. 2. System design

Fig. 3. Simulated Candela distribution in different coordinate systems

Fig. 4. Distribution of illumination of different specifications of light sources

Fig. 5. LED driver circuit design block diagram

Fig. 6. Pipelined active polarization image processing method

Fig. 7. Schematic diagram of experimental setup

Fig. 8. Photograph of experimental apparatus

Fig. 9. Experimental layout

Fig. 10. USAF-1951 technical target experimental data

Fig. 11. Small submarine model experimental data