Fig. 1. Schematic of FGI with a polychromatic source

Fig. 2. Simulation of X-ray speckle field. (a) Monochromatic speckle field; (b) polychromatic speckle field; (c) normalized second-order correlation function of monochromatic speckle field; (d) normalized second-order correlation function of polychromatic speckle field

Fig. 3. Spectral distribution of simulated laboratory X-ray source

Fig. 4. Transmission function of sample. (a) Amplitude sample; (b) phase sample

Fig. 5. Diffraction patterns of samples obtained by intensity correlation calculation. (a) Amplitude sample; (b) phase sample

Fig. 6. Reconstructed diffraction patterns of samples. (a) Amplitude sample; (b) phase sample

Fig. 7. Reconstructed diffraction patterns for different RSNR. (a) Amplitude sample; (b) phase sample

Fig. 8. Frms for reconstructed diffraction patterns for different RSNR