Fig. 1. Typical scattering imaging system

Fig. 2. Simulation results of object offset. (a) Reference image; (b) offset image; (c) reference image after autocorrelation; (d) cross-correlation between offset image and reference image; (e) horizontal offset between offset image and reference image; (f) vertical offset between offset image and reference image

Fig. 3. Experimental setup

Fig. 4. Results of axial object tracking. (a) Speckle pattern at initial position; (b) speckle pattern at axial depth of 240 mm; (c) speckle pattern at axial depth of 255 mm; (d) reconstruction result of speckle pattern at initial position; (e) reconstruction result of speckle pattern at depth of 240 mm; (f) reconstruction result of speckle pattern at depth of 255 mm; (g) structural similarity of PSF with different scales at 240 mm; (h) structural similarity of PSF with different scales at 255 mm

Fig. 5. Optical memory effect rang of scattering medium

Fig. 6. Results of horizontal object tracking. (a) Speckle pattern of lateral shift; (b) PSF solved by lateral shift; (c) reconstruction of shifted objects

Fig. 7. Cross-correlation calculation of lateral offset. (a) The first offset; (b) the 3rd offset

Table 1. Results of axial tracking

Table 2. Results of horizontal tracking