Holography is a technique for recording and reconstructing the complex-valued wave field of light (both amplitude and phase) by means of diffraction and interference phenomena. The physical process of light propagation can be modelled and simulated on a computer, allowing for the generation of computer generated holograms (CGHs). However, generating holograms for 3D objects requires significant amounts of computation time. Althoughmany solutions have been proposed over the years for accelerating this process, occlusions are still a challenging issue. My research activities are focused on the implementation of a novel fast technique for computer-generated holograms with occlusion processing based on the wavefront recording plane method, suitable for volumetric data e.g. point clouds. The method uses a look-up table for the calculation of the fields to improve the computational complexity and adheres a Gaussian distribution to the individual points to improve the visual quality. Moreover, a novel technique for occlusion culling of point clouds is suggested. Performance tests show that for a full-parallax high-definition CGH a speedup factor ofmore than 2,500 compared to the traditional ray-tracing method can be achieved.
Symeonidou, A 2015, 'Computer-generated holograms with occlusion culling', NSE PhD Day, Brussels, Belgium, 22/05/15 - 22/05/15.
Symeonidou, A. (2015). Computer-generated holograms with occlusion culling. Poster session presented at NSE PhD Day, Brussels, Belgium.
@conference{67571bda907d441080bf995e8b5f20d2,
title = "Computer-generated holograms with occlusion culling",
abstract = "Holography is a technique for recording and reconstructing the complex-valued wave field of light (both amplitude and phase) by means of diffraction and interference phenomena. The physical process of light propagation can be modelled and simulated on a computer, allowing for the generation of computer generated holograms (CGHs). However, generating holograms for 3D objects requires significant amounts of computation time. Althoughmany solutions have been proposed over the years for accelerating this process, occlusions are still a challenging issue. My research activities are focused on the implementation of a novel fast technique for computer-generated holograms with occlusion processing based on the wavefront recording plane method, suitable for volumetric data e.g. point clouds. The method uses a look-up table for the calculation of the fields to improve the computational complexity and adheres a Gaussian distribution to the individual points to improve the visual quality. Moreover, a novel technique for occlusion culling of point clouds is suggested. Performance tests show that for a full-parallax high-definition CGH a speedup factor ofmore than 2,500 compared to the traditional ray-tracing method can be achieved.",
keywords = "Holography",
author = "Athanasia Symeonidou",
year = "2015",
month = may,
day = "22",
language = "English",
note = "NSE PhD Day ; Conference date: 22-05-2015 Through 22-05-2015",
}