Fig. 1. Schematic of simulation system and focusing. (a) Schematic of simulation system; (b) schematic of simulation parameters; (c) scattering through scattering medium without DMD modulation; (d) focusing through scattering medium with DMD modulation

Fig. 2. Schematic of binary algorithm. (a) input and output map; (b) intensity division of mth pixel unit

Fig. 3. Focusing effect of proposed algorithm. (a) Relationship between enhancement factor and number of sampling; (b) focusing effect with number of sampling of N; (c) focusing effect with number of sampling of 4N

Fig. 4. Simulation results of single point focusing. (a) Speckle pattern without DMD modulation; (b) single point focusing at 5050th pixel; (c) modulation pattern loaded on DMD; (d) intensity profile of dash line in Fig. 4(b)

Fig. 5. Focusing results at different pixel positions. (a) 1225th pixel; (b) 1750th pixel; (c) 1775th pixel; (d) 5025th pixel; (e) 5050th pixel; (f) 5075th pixel; (g) 8425th pixel; (h) 8450th pixel; (i) 8475th pixel

Fig. 6. Results of multi-point focusing. (a) Two-point focusing at 1225th and 8475th pixel; (b) two-point focusing at 1225th and 2025th pixel; (c) intensity profile of dash line in Fig.6(b)