Fig. 1. Binary PWM sequence patterns corresponding to gray levels 76, 127, and 255.

Fig. 2. Light intensities of object points reconstructed from BW-CGHs and conventional binary CGH.

Fig. 3. Assignment of the object points of the 3D object to the bit planes.

Fig. 4. Simple method for calculating the respective bit planes B⁰, B¹, and B².

Fig. 5. Proposed method for calculating bit planes B⁰, B¹, and B² by grouping the gradation values of the object points.

Fig. 6. Bit-plane flags in the respective groups.

Fig. 7. Multi-GPU cluster electroholography system with a single SLM.

Fig. 8. Pipeline processing for real-time gradation-expressible electroholography based on BW-CGH.

Fig. 9. Eight-gradation holographic 3D video reproduction using bit plans B⁰, B¹, and B² on a DMD.

Fig. 10. Eight-gradation holographic 3D video reproduction using the bit planes B⁰, B¹, and B² on a DMD.

Fig. 11. Optical setup used in the evaluation experiment.

Fig. 12. Gradation values of 3D model “Jack-o’-lantern” and “Stanford bunny.”

Fig. 13. Snapshot of a reconstructed 3D video “Jack-o’-lantern” (Data File 1).

Fig. 14. Snapshot of a reconstructed 3D video “Stanford bunny” (Data File 2).

Fig. 15. Measured light intensities obtained from the snapshots of the reconstructed 3D videos (Data File 1 and Data File 2).