Fig. 1. Block diagram of a communication system^[2]

Fig. 2. Schematic diagram of defining the statistical resolution^[28]

Fig. 3. Extending the spatial frequency spectrum range by the structured illumination microscopic technique^[33]

Fig. 4. Schematic diagram of the stimulated emission depletion microscopic technique^[36]

Fig. 5. Schematic diagram of the stochastic optical reconstruction microscopic technique^[43]

Fig. 6. Sub-systems of the sampled imaging system

Fig. 7. Schematic diagram of camera imaging principle

Fig. 8. Schematic diagram of Zernike phase contrast principle

Fig. 9. Schematic diagram of the principle of holography

Fig. 10. Schematic diagram of the principle of coherent diffraction imaging

Fig. 11. Schematic diagram of the apparatus in the HB-T experiment^[89]

Fig. 12. Schematic diagram of the principle of real-space ghost imaging

Fig. 13. Schematic diagram of the principle of phase ghost imaging^[91]

Fig. 14. Schematic diagram of the principle of holographic ghost imaging^[93]

Fig. 15. Schematic diagram of the principle of diffraction ghost imaging^[79]

Fig. 16. Schematic diagram of ghost imaging lidar system^[74]

Fig. 17. Diagram of ghost imaging camera system^[75]

Fig. 18. Statistical resolution limit in high-dimensional light-field space of ghost imaging camera^[115]