Fig. 1. Four-band coaxial imaging optical system

Fig. 2. Four-band coaxial imaging experimental platform

Fig. 3. Four-band original images captured at the same time

Fig. 4. Preprocessed four-band images

Fig. 5. Flow chart of dual-band natural color fusion algorithm

Fig. 6. Dual-band natural color fusion images

Fig. 7. Flow chart of four-band natural color fusion algorithm

Fig. 8. Four-band natural color fusion images

Fig. 9. Q-T relationship curve

Fig. 10. Flow chart of dual-band temperature measurement software

Fig. 11. Temperature image generated by MW and LW IR images

Fig. 12. Single-point stability results of temperature measurement

Fig. 13. Result of experiment on the sea

Fig. 14. Result of experiment on the land