Fig. 1. CCD optical systems with different acquisition methods of multi-view projection images. (a) Orthogonal scanning; (b) circular scanning

Fig. 2. Diagrams of Fourier spectra synthesized from multi-view projections. (a) Extraction of circle spectrum from single projection image; (b) spectrum synthesized by orthogonal scanning; (c) spectrum synthesized by circular scanning

Fig. 3. Error between simulated ellipse and real ellipse as a function of φ value

Fig. 4. Schematics of Fourier spectrum synthesis of orthogonal scanning projection images. (a) Simulation of circular spectrum; (b) synthesized spectrum

Fig. 5. Schematic of weighted Fourier spectrum sampling for projection image

Fig. 6. Flow chart of spectrum sampling of orthogonal scanning multi-view projection image

Fig. 7. Partial multi-view projection images from virtual 3D model. (a) θ=-6°; (b) θ=-3°; (c) θ=0°; (d) θ=3°; (e) θ=6°; (f) φ=0°; (g) φ=72°; (h) φ=144°; (i) φ=216°; (j) φ=288°

Fig. 8. Synthesized spectra, CGHs, and reconstructed images of projection images using traditional orthogonal scanning method. (a) Results based on 61 projection images; (b) results based on 121 projection images

Fig. 9. Synthesized spectra, CGHs, and reconstructed images of projection images obtained by traditional circular scanning method. (a) Results based on 60 projection images; (b) results based on 120 projection images

Fig. 10. Synthesized spectra, CGHs, and reconstructed images of projection images obtained by proposed method with non-redundant sampling. (a) Results based on 61 projection images; (b) results based on 121 projection images

Fig. 11. Synthesized spectra, CGHs, and reconstructed images of projection images obtained by proposed method with weighted sampling processing. (a) Results based on 61 projection images; (b) results based on 121 projection images

Fig. 12. SNR variation curves of CGH reproduction images simulated by circular scanning at different φ. (a) T=1.0; (b) T=0.75; (c) T=0.50; (d) T=0.25

Fig. 13. Partial multi-view projection images of complicated 3D model using orthogonal scanning

Fig. 14. Synthesized spectra, CGHs, and reconstructed images at different positions of complicated 3D model using orthogonal scanning. (a) Results from traditional method; (b) results from proposed method