Fig. 1. Sketch of the spatial spectrum of (a) a conventional ideal off-axis hologram and (b) a CSM hologram encoded by eight off-axis holograms.

Fig. 2. Flowchart of the CSM algorithm for fast reconstruction of off-axis holograms.

Fig. 3. Off-axis holographic recording setup used in experiments for CSM algorithm. S, source; BE, beam expander; BS, beam splitter; M, mirror; L, lens; CCD, image sensor.

Fig. 4. (a) Example of the off-axis holograms recorded in the experiment. (b) Example of the spatial spectrum of a CSM function encoded by eight recorded holograms.

Fig. 5. One group of the reconstructed wrapped phases using the CSM algorithm.

Fig. 6. Example of the compared results of the retrieved phases using the CSM algorithm (the blue line) with that using the CV method (the red dashed line) at the same position of the retrieved phase distributions from the same hologram as the part marked by the red line in Fig. 5(a).

Fig. 7. Examples of the images reconstructed by using (a) the CSM algorithm and (b) the CV algorithm when the object is a transmittance USAF resolution target with group numbers of 2 to 7.