Fig. 1. Flowchart of the proposed reconstruction algorithm

Fig. 2. Evaluation of reconstruction results under different filter sizes. (a) Results of filter 1; (b) results of filter 2; (c) results of filter 3; (d) results of filter 4

Fig. 3. Simulated experimental data. (a) USAF resolution target; (b) off-axis hologram

Fig. 4. Simulation results of the USAF resolution target. (a) (b) Reconstructed amplitude result and phase result by FT; (c) (d) reconstructed amplitude result and phase result by ZP; (e) (f) reconstructed amplitude result and phase result by algorithm of reference [24]; (g) (h) reconstructed amplitude result and phase result by proposed algorithm ; (i) 1D amplitude profiles extracted from 4 reconstructed amplitude results ; (j) 1D phase profiles extracted from 4 reconstructed phase results

Fig. 5. Schematic of the Mach-Zehnder digital holography system

Fig. 6. Reconstruction results of the USAF resolution target. (a) Hologram;(b) raw spectrum; (c) spectrum of the proposed method; (d) reconstructed result by FT; (e) reconstructed result by ZP; (f) reconstructed result by algorithm of reference [24]; (g) reconstructed result by proposed algorithm; (h) 1D profiles along the red lines; (i) enlarged images of the pink box regions

Fig. 7. Reconstruction results of drosophila wings. (a) Hologram; (b) raw spectrum; (c) spectrum of proposed algorithm; (d) (e) reconstructed amplitude result and reconstructed phase result by FT; (f) (g) reconstructed amplitude result and reconstructed phase result by ZP; (h) (i) reconstructed amplitude result and reconstructed phase result by algorithm of reference [24]; (j) (k) reconstructed amplitude result and reconstructed phase result by proposed algorithm

Fig. 8. Reconstruction results of the pumpkin stem. (a) Hologram; (b) raw spectrum; (c) spectrum of proposed algorithm; (d) (e) reconstructed amplitude result and reconstructed phase result by FT; (f) (g) reconstructed amplitude result and reconstructed phase result by ZP; (h) (i) reconstructed amplitude result and reconstructed phase result by algorithm of reference [24]; (j) (k) reconstructed amplitude result and reconstructed phase result by proposed algorithm