Fig. 1. Schematic diagram of ghost imaging technique for recovering information of occluded object

Fig. 2. Distributions of random speckles after propagating different distances. (a) Distribution of initial random speckles; distributions of random speckles after propagating (b) 1 cm, (c) 10 cm, and (d) 25 cm, respectively

Fig. 3. Diagram of experimental system using ghost imaging technique to recover information of occluded object

Fig. 4. Measured objects and occluded objects. (a) Measured object and occlusion object observed from direction of source; (b) measured object and occlusion object observed from direction of detector

Fig. 5. Experimental results of occluded object information recovered by ghost imaging technique for different distances between object to be tested and occluded object. (a) 11 cm; (b) 13 cm; (c) 15 cm; (d) 18 cm; (e) 20 cm; (f) 22 cm; (g) 24 cm; (h) 25 cm; (i) 27 cm