Fig. 1. Principle of ghost imaging

Fig. 2. THz active ghost imaging system

Fig. 3. Reconstruction results with GI and GISC algorithm. (a) Original object; (b) GI result with N=3000; (c) GISC result with N=1500

Fig. 4. Image reconstruction results of different imaging distances and sizes of random pattern

Fig. 5. SNR curves. (a) Relationship between L and SNR; (b) relationship between d and SNR

Fig. 6. Reconstruction results of different sampling numbers (L=5 mm, d=6 mm). (a)-(e) Results with random field; (f)-(j) results with related field

Fig. 7. Relationship between N and SNR

Fig. 8. Rotation rule of amplitude plates. (a) Sampling rotationally; (b) initial position

Fig. 9. THz active correlation ghost imaging device

Fig. 10. Four THz fields by actually scanning

Fig. 11. Experiment of double-slit. (a)-(e) Results with different δ values; (f)-(j) normalized projective curves with N=600, respectively

Fig. 12. Experiment of metal object with N=600. (a) Object picture; (b) intensity image with GI; (c) gray image with GI; (d) intensity image with GISC; (e) gray image with GISC