Fig. 1. Experimental setup for scattering imaging

Fig. 2. Schematic diagram of rotation of diffuser

Fig. 3. Speckle contrast of the speckle pattern versus the rotational rate of diffuser. The exposure time of camera is 160 ms. The color bar represents the relative value of light intensity. (a) The cases of 220 grit ground glass diffuser. The rotational rate is 0 r/s; (b) The cases of 220 grit ground glass diffuser. The rotational rate is 80 r/s; (c) The cases of 600 grit ground glass diffuser. The rotational rate is 0 r/s; (d) The cases of 600 grit ground glass diffuser. The rotational rate is 80 r/s

Fig. 4. Speckle correlation imaging when the rotational rate of diffuser is 80 r/s

Fig. 5. Speckle contrast and imaging correlation coefficient versus the rotational rate of diffuser. The cases of the 220 grit rotation diffuser are shown in (a)-(d), the cases of the 600 grit rotation diffuser are shown in (e)-(h); The exposure time of camera is 40 ms and 70 ms in (a), (c), (e) and (g), the exposure time of camera is 100 ms, 130 ms, 160 ms, 190 ms and 220 ms in (b), (d), (f) and (h); The cases of the speckle contrast versus the rotational rate of rotating diffuser are shown in (a), (b), (e) and (f), correlation coefficient of speckle correlation imaging of target "4" versus rotation rate of diffuser are shown in (c), (d), (g) and (h)

Fig. 6. Speckle contrast and imaging correlation coefficient versus the exposure time (The rotational rate of diffuser is 80 r/s). (a) Speckle contrast versus the exposure time; (b) Correlation coefficient versus the exposure time

Fig. 7. Schematic of phase retrieval algorithm. (a) Obtaining PSF of initial target; (b) Scheme of PSF and HIO&ER hybrid algorithm

Fig. 8. Original image of target by microscope. (a) Target “4”; (b) Target “2”; (c) Target “3”

Fig. 9. Experimental results of target “4”. The color bar represents the relative value of the light intensity. (a) Optical Speckle; (b) Speckle autocorrelation; (c) Fourier phase of PSF; (d) Image of target by PSF deconvolution

Fig. 10. Reconstruction image under 40 ms. The PSF+HIO algorithm is used to reconstruct images in (a)-(c). The speckle autocorrelation algorithm is used to reconstruct images in (d)-(f)

Fig. 11. Reconstruction image under 160 ms. The PSF+HIO algorithm is used to reconstruct images in (a)-(c). The speckle autocorrelation algorithm is used to reconstruct images in (d)-(f)