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10 October 2020 An improved error diffusion algorithm for phase-only computer-generated holograms
Kexuan Liu, Liangcai Cao
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Proceedings Volume 11551, Holography, Diffractive Optics, and Applications X; 1155117 (2020) https://doi.org/10.1117/12.2574344
Event: SPIE/COS Photonics Asia, 2020, Online Only
Abstract
Compared with other phase-only hologram generation approach, the bidirectional error diffusion algorithm eliminates the need for random phase and iteration, which significantly shortens the calculation time and improves the reconstructed image quality by reducing the influence of speckle noise. The basic concept of error diffusion method is compensating for the effect of removing amplitude information by diffusing the errors to their neighborhood unprocessed pixels. Based on this method, an optimization algorithm for phase-only hologram generation is proposed. The amplitudes of the errors used for diffusion are optimized by introducing a changeable coefficient for each different hologram. The simulation results show that the reconstructed image quality with the proposed optimization algorithm can be increased by up to 4 dB. Smoother amplitude information on the hologram plane can be obtained, thus less information is lost in the phase-only hologram generation process.
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Kexuan Liu and Liangcai Cao "An improved error diffusion algorithm for phase-only computer-generated holograms", Proc. SPIE 11551, Holography, Diffractive Optics, and Applications X, 1155117 (10 October 2020); https://doi.org/10.1117/12.2574344
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KEYWORDS
Diffusion
Holograms
Computer generated holography
3D image reconstruction
Image quality
Optimization (mathematics)
Reconstruction algorithms
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