Fig. 1. CGI system for penetrating scattering media

Fig. 2. Experimental results of CGI penetrating scattering medium^[10,12]. (a) N_i≈0; (b) N_i≠0; (c) degraded patterns; (d) undegraded patterns

Fig. 3. Transmission path of photon in cylindrical scattering medium

Fig. 4. Schematic diagram of CGI combined with Monte Carlo model

Fig. 5. Lena simulation results at different uniform mass concentrations of smoke (0.1, 0.2, 0.3, 0.4, 0.5 g·m^-3). (a) PSF of smoke at different concentrations; (b) results of TI; (c) reconstruction images of CGI

Fig. 6. Relationship between reconstruction image quality and smoke mass concentration in three cases

Fig. 7. Smoke with uneven concentration distribution at some heights. (a) z=2.5 m; (b) z=5 m; (c) z=10 m;(d) z=20 m

Fig. 8. Lena simulation results at different uneven mass concentrations of smoke(20, 30, 50, 100 g·s^-1). (a) PSF of smoke; (b) TI results; (c) CGI results

Fig. 9. Results of CGI at time-varying concentrations. (a) Random variation range (0.9,1); (b) random variation range (0.99,1); (c) random variation range (0.999,1); (d) random variation range (0.9999,1)