Fig. 1. Flowchart of the underwater polarization imaging algorithm based on spectral information

Fig. 2. Underwater imaging experiment. (a) Experimental setup; (b) intensity image in clear water

Fig. 3. Original orthogonal polarization images and processed images in the turbid water with medium turbidity. (a) I∥x,y;(b) I⊥x,y; (c) I∥hx,y; (d) I⊥hx,y; (e)(f) spectrums of I⊥x,y before and after filtering

Fig. 4. Optimal cut-off frequency search for filter preprocessing in different concentration scenarios

Fig. 5. Images processed by different methods and partial enlarged images and light intensity distribution at the scribe line in underwater environments with different turbidity

Fig. 6. Images of cows processed by different methods with different turbidity

Fig. 7. fEME value line chart of processed images in Fig. 6

Fig. 8. Images of cube and disk processed by different methods with medium and high turbidity