Fig. 1. Schematic diagram of optical path construction of traditional 3D-LFD viewpoint. (a) Optical path construction of viewpoint; (b) optical path diagram of lens unit

Fig. 2. Reconstructed images of black and white patterns with low viewpoint density. (a) ρ=1.2/(°); (b) ρ=1.0/(°); (c) ρ=0.8/(°)

Fig. 3. Reconstructed images of black and white patterns with high viewpoint density. (a) ρ=2.3/(°); (b) ρ=2.5/(°); (c) ρ=2.7/(°)

Fig. 4. Curve of SSIM index changing with viewpoint density

Fig. 5. Distribution curve of viewpoint density

Fig. 6. Spot diagram of single lens

Fig. 7. Initial structure of GDL

Fig. 8. Spot diagram of GDL

Fig. 9. Schematic diagram of optical path construction of GDLA viewpoint. (a) Optical path construction diagram of GDLA; (b) optical path diagram of GDL

Fig. 10. Main light distribution of GDL

Fig. 11. Capturing and mapping encoding. (a) Capturing method of non-uniform viewpoints; (b) mapping encoding

Fig. 12. Structure diagram of simulation experiment system

Fig. 13. Simulation results of 3D scenes with different viewing angles. (a) 3D light field effect of TVDU; (b) SSIM of TVDU; (c) 3D light field effect of GDLA; (d) SSIM of GDLA

Fig. 14. SSIM indices of simulation results with different viewing angles

Fig. 15. Reconstructed 3D images with different angles. (a) -50°; (b) 0°; (c) 50°