Fig. 1. Model of a bionic four-channel

Fig. 2. Mapping improvement program. (a) HSI model; (b) PDI model

Fig. 3. Original image and experimental image of threshold range ∆. (a) Original image; (b) experimental image of threshold range ∆

Fig. 4. Polarization imaging device

Fig. 5. Statistical chart of mean range

Fig. 6. Gray scale contrast value of the different threshold nodes

Fig. 7. Signal-to-clutter ratio value of different threshold nodes

Fig. 8. Fisher distance value of different threshold nodes

Fig. 9. Graphs of experimental results for four experimental scenarios. (a)-(d) Original light intensity graphs; (e)-(h) experimental graphs of the angle of polarization; (i)-(l) experimental graphs of Lin's scheme^[4]; (m)-(p) experimental graphs of Tyo's scheme^[5]; (q)-(t) experimental graphs of Zhong's scheme^[23]; (u)-(x) experimental graphs of the PDI model in this paper