Figure 3. Comparison of reconstruction results corresponding to a Pap smear sample.

Left column: the reconstruction result that is obtained by using N_z = 8 holograms captured at different sensor-to-sample distances processed by the standard multi-height phase retrieval method, which serves as our reference image. Middle column: Same as the left column, except for N_z = 2. Right column: Reconstruction result using the same N_z = 2 acquired holograms, processed by our sparsity-based multi-height phase recovery algorithm, showing an excellent match to N_z = 8 case shown in (a,d).