Tomoyoshi Shimobaba

Split-Lohmann (SL) holography has recently emerged as a high-speed hologram computation method whose calculation time is independent of the number of layers, distinguishing it from conventional layer-based approaches. However, SL holography introduces depth-dependent spatial shifts and persistent ringing artifacts when a random phase is not employed. In this study, we propose a modified SL holography that simultaneously mitigates both depth-dependent shifts and ringing.

Computer-generated holography (CGH) is a promising technology for augmented reality displays, such as head-mounted or head-up displays. However, its high computational demand makes it impractical for implementation. Recent efforts to integrate neural networks into CGH have successfully accelerated computing speed, demonstrating the potential to overcome the trade-off between computational cost and image quality.

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.