Fig. 1. Timeline of developments in ghost imaging, compressed sampling, and single-pixel imaging

Fig. 2. Experimental design of ghost imaging based on entangled photon pairs

Fig. 3. Experimental design of ghost imaging based on classical light sources. (a) Lensless classical light ghost imaging; (b) speckle-to-speckle classical light ghost imaging

Fig. 4. Experimental design of computational lensless ghost imaging

Fig. 5. Experimental designs of single-pixel imaging and computational ghost imaging. (a) System scheme of single-pixel imaging; (b) system scheme of computational ghost imaging with imaging lens

Fig. 6. Structural diagram of deep neural network