Fig. 1. Focusing process of incident light passing through scattering medium

Fig. 2. Processing flow of GGPSO algorithm

Fig. 3. Optimization process of feedback wavefront shaping technology

Fig. 4. Influence of different parameters on GGPSO algorithm. (a) β; (b) MR; (c) CR

Fig. 5. Light spot signals under numerical simulation and experimental conditions. (a) Experiment without background noise; (b) experiment with background noise; (c) numerical simulation without noise; (d) numerical simulation with noise

Fig. 6. Simulation curves of different algorithms at different noise levels. (a) Without noise; (b) 10 dB; (c) 4 dB; (d) 1 dB

Fig. 7. Optimized phase distribution and focusing effect after scattering sample. (a) Phase distribution; (b) focusing effect

Fig. 8. Experimental device and its plane diagram. (a) Plane diagram; (b) experimental device

Fig. 9. Iterative optimization results of different algorithms. (a) Measurement results; (b) simulation results

Fig. 10. Optimized phase distribution and focusing effect after scattering sample under different algorithms. (a) PSO optimization algorithm; (b) BBPSO optimization algorithm; (c) GGPSO optimization algorithm