Fig. 1. Phase unwrapping flowchart of the DC-UMnet network

Fig. 2. Network structure of DC-UMnet

Fig. 3. Module of code part

Fig. 4. Module of decoding part

Fig. 5. Test results of simulation test set. (a) Wrapping phase; (b) Real phase; (c) DC-UMnet network; (d) 3D reconstructed image; (e) Sectional profile of the reconstructed image

Fig. 6. Unwrapping results of undersampled phase

Fig. 7. Result of undersampled phase unwrapping with noise

Fig. 8. The recording of holograms

Fig. 9. Holograms of sample

Fig. 10. Micropore 1 results of phase unwrapping

Fig. 11. Micropore 1 section contour of reconstructed image

Fig. 12. Micropore results of phase unwrapping

Fig. 13. Micropore 2 section contour of reconstructed image