Fig. 1. Generation of parallel phase-shifting digital hologram

Fig. 2. Interpolation algorithm for conventional parallel phase-shifting digital holography

Fig. 3. Holograms and its frequency spectra. (a) Lossless 0° phase-shifting hologram; (b) spectrum of lossless 0° phase-shifting hologram; (c) 0° phase-shifting hologram after conventional interpolation; (d) spectrum of 0° phase-shifting hologram after conventional interpolation; (e) comparison of Figs. 3(b) and 3(d)

Fig. 4. Proposed interpolation method for parallel phase-shifting holography

Fig. 5. Object and reconstructed results. (a) Original object; (b) parallel phase-shifting hologram; (c) reconstructed image by conventional method; (d) reconstructed image by method 1; (e) reconstructed image by method 2; (f) reconstructed image by proposed method

Fig. 6. Object and reconstructed results. (a) Original object; (b) reconstructed image obtained by conventional method; (c) reconstructed image obtained by method 1; (d) reconstructed image obtained by method 2; (e) reconstructed image obtained by proposed method; (f) eye part of Fig. 6(b); (g) eye part of Fig. 6(c); (h) eye part of Fig. 6(d); (i) eye part of Fig.

Fig. 7. Reconstructed images with speckle noise. (a)(e) Traditional method; (b)(f) method 1; (c)(g) method 2; (d)(h) proposed method