Fig. 1. Optical path of continuous terahertz Gabor in-line digital holographic imaging

Fig. 2. Simulation scene

Fig. 3. Scene projection and holograms. (a) Scene projection; (b) normalized hologram; (c) inverted hologram

Fig. 4. Discrete simulation scene

Fig. 5. PSNR and MSSIM of each sample changed with τ at t=300. (a) PSNR; (b) MSSIM

Fig. 6. Reconstructed images and their differences with the standard images at t=300. (a) Continuous; (b) discrete

Fig. 7. Reconstructed images of samples 1 and 3 and their differences with the standard images at t=300. (a) Continuous “H1” and “H3”; (b) discrete “H11” and “H31”

Fig. 8. PSNR of the target part of the sample changed with τ at t=300

Fig. 9. Reconstructed images with different iterations. (a) t=200; (b) t=350

Fig. 10. Change of sample PSNR and MSSIM with τ under different iterations. (a) t=200; (b) t=350

Fig. 11. Sample “T” simulation scene, PSNR of the sample and the target part changed with τ at t=300. (a) Scene; (b) whole; (c) target

Fig. 12. Change of PSNR of sample “T” with τ under different iterations. (a) t=200; (b) t=350