Fig. 1. Flow chart of digital holographic PU method based on DCT-TIE

Fig. 2. Simulation results of object peaks, and unit of scale bar is rad for all figures. (a) Set phase map; (b) corresponding wrapped phase map; (c) unwrapping phase map with DCT-TIE method; (d) unwrapping phase map with FFT-TIE method

Fig. 3. Simulation results of object cameraman. (a) Set phase map; (b) corresponding wrapped phase map; (c) unwrapping phase map with DCT-TIE method; (d) unwrapping phase map with FFT-TIE method

Fig. 4. Experimental results of bone marrow cancer cells with off-axis digital holographic microscope. (a) Hologram; (b) corresponding wrapped phase map; (c) unwrapping phase map with DCT-TIE method; (d) unwrapping phase map with FFT-TIE method

Fig. 5. Phase maps of bone marrow cancer cells. (a), (b) Rewrapped phase maps of Fig.4(c) and 4(d); (c) compensated unwrapped phase map

Fig. 6. Experimental results of Chinese medicine pseudo-ginseng. (a) Hologram; (b) corresponding wrapped phase map; (c) unwrapping phase map with DCT-TIE method; (d) unwrapping phase map with FFT-TIE method

Fig. 7. Rewrapped phase maps of Chinese medicine pseudo-ginseng. (a) Rewrapped phase map of Fig.5(c); (b) rewrapped phase map of Fig.5(d)

Fig. 8. Sketch of RMP extending scheme. (a) Simulated wrapped phase map, and area surrounded by white dashed lines is original map; (b) RMSE and process time for object peaks unwrapped by RDCT-TIE method using different α

Fig. 9. Unwrapping phase maps using DCT-LS method. (a) Peaks; (b) cameraman; (c) bone marrow cancer cells; (d) Chinese medicine pseudo-ginseng