Fig. 1. Processing procedure for a DPH. (a) Transformation of an original object into its complex hologram. (b) Encoding principle for the single-pixel method. (c) Encoding principle for the macro-pixel method. (d) DPH encoded by the macro-pixel method.

Fig. 2. Decomposition of a complex hologram into four sub-holograms and time-sequential uploading onto an SLM in the proposed spatiotemporal multiplexing method.

Fig. 3. Numerical reconstructions of test images using different methods. (a) Original amplitude with mostly low-spatial-frequency components. (b) Reconstruction of (a) using a single-pixel DPH. (c) Reconstruction of (a) using sub-DPHs. (d) Reconstruction of (a) using spatiotemporal multiplexing DPHs. (e) Original amplitude with mostly high-spatial-frequency components. (f) Reconstruction of (e) using a single-pixel DPH. (g) Reconstruction of (e) using sub-DPHs. (h) Reconstruction of (e) using spatiotemporal multiplexing DPHs. The red curves represent the original image, and other colored curves represent the reconstructed images.

Fig. 4. Numerically reconstructed images based on different methods. (a) Original image. (b) Reconstruction using a single-pixel DPH. (c) Reconstruction using one sub-DPH. (d) Reconstruction using spatiotemporal multiplexing DPHs. (e) Curves of PSNRs for the reconstructed images changing with the diameter of filter. (f) Curves of SSIMs for the reconstructed images changing with the diameter of the filter.

Fig. 5. Schematic of the optical system for the proposed DPH method.

Fig. 6. Optically reconstructed images using different methods with partial enlargement. (a) Original image. (b) Reconstruction using a single-pixel DPH. (c) Reconstruction using one sub-DPH. (d) Reconstruction using a spatiotemporal multiplexing DPH.