Holograms can be observed from different viewpoints, because light waves can be encoded to propagate in multiple directions. Thus, accurate holograms for 3D display should model viewpoint-dependent light reflections. We proposed a new, to the best of our knowledge, hologram generation method for objects represented by polygonal meshes, whose lighting changes as the viewer moves, all while rendering smooth shading using low-poly objects. The proposed method leverages bump mapping and converts it into a bump-phase map encoding the propagation frequency and then spreads the reflected light wave so that only a specific viewpoint can receive them. Simulation experiments with small pixel pitches confirm the method{\textquoteright}s high computational performance.
Wang, F, Blinder, D, Udjaja, Y, Ito, T & Shimobaba, T 2024, 'Viewpoint-dependent lighting on polygonal holograms using bump mapping', Optics Letters, vol. 49, no. 18, pp. 5180-5183. https://doi.org/10.1364/OL.530394
Wang, F., Blinder, D., Udjaja, Y., Ito, T., & Shimobaba, T. (2024). Viewpoint-dependent lighting on polygonal holograms using bump mapping. Optics Letters, 49(18), 5180-5183. https://doi.org/10.1364/OL.530394
@article{aa59da780ae549208cd3113d82829dfd,
title = "Viewpoint-dependent lighting on polygonal holograms using bump mapping",
abstract = "Holograms can be observed from different viewpoints, because light waves can be encoded to propagate in multiple directions. Thus, accurate holograms for 3D display should model viewpoint-dependent light reflections. We proposed a new, to the best of our knowledge, hologram generation method for objects represented by polygonal meshes, whose lighting changes as the viewer moves, all while rendering smooth shading using low-poly objects. The proposed method leverages bump mapping and converts it into a bump-phase map encoding the propagation frequency and then spreads the reflected light wave so that only a specific viewpoint can receive them. Simulation experiments with small pixel pitches confirm the method{\textquoteright}s high computational performance.",
author = "Fan Wang and David Blinder and Yogi Udjaja and Tomoyoshi Ito and Tomoyoshi Shimobaba",
note = "Funding Information: Japan Society for the Promotion of Science (22H03607, P22752, P23378); Fonds Wetenschappelijk Onderzoek (G089424N, 12ZQ223N); IAAR Research Support Program, Chiba University, Japan. Publisher Copyright: {\textcopyright} 2024 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.",
year = "2024",
month = sep,
day = "15",
doi = "10.1364/OL.530394",
language = "English",
volume = "49",
pages = "5180--5183",
journal = "Optics Letters",
issn = "0146-9592",
publisher = "Optical Society of America",
number = "18",
}