2026-03-11T13:02:06Z https://kansai-u.repo.nii.ac.jp/oai

oai:kansai-u.repo.nii.ac.jp:00011090 2023-05-15T13:54:55Z 528:1588:1589:1591

Computer-generated holograms for three-dimensional surface objects with shade and texture 70229475 Matsushima, Kyoji Digitally synthetic holograms of surface model objects are investigated for reconstructing three-dimensional objects with shade and texture. The objects in the proposed techniques are composed of planar surfaces, and a property function defined for each surface provides shape and texture. The field emitted from each surface is independently calculated by a method based on rotational transformation of the property function by use of a fast Fourier transform (FFT) and totaled on the hologram. This technique has led to a reduction in computational cost: FFT operation is required only once for calculating a surface. In addition, another technique based on a theoretical model of the brightness of the reconstructed surfaces enables us to shade the surface of a reconstructed object as designed. Optical reconstructions of holograms synthesized by the proposed techniques are demonstrated. Optical Society of America 2005-03-21 eng journal article VoR http://hdl.handle.net/10112/5570 https://kansai-u.repo.nii.ac.jp/records/11090 10.1364/ao.44.004607 00036935 Applied Optics 44 22 4607 4614 https://kansai-u.repo.nii.ac.jp/record/11090/files/KU-1100-20050321-50.pdf application/pdf 1.9 MB 2019-05-22