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Paper Abstract and Keywords
Presentation 2024-03-05 11:48
Point cloud generation for computer-generated hologram including transmission and refraction -- Fast generation with Unity --
Motoya Kayamori, Takeshi Yamaguchi, Hiroshi Yoshikawa (Nihon Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Computer-generated hologram (CGH) is hologram in which interference fringe is computed by a computer, and the CG data must be converted into a point cloud for CGH computation. Our group proposed a point cloud generation method using photon maps (PM method), which can generate realistic point clouds by using photons, which are light particles, but it takes a lot of time to generate point clouds. However, it took a long time to generate the point cloud, and a method using Unity was proposed (U2Dat), which enabled fast and realistic point cloud generation, but had problems in representing reflections and refractions, which were possible with the PM method. In this research, ray tracing is introduced to the point cloud generation method using Unity, and the point cloud is moved by reflection and refraction to generate a fast and realistic point cloud. The realism of CG data is also improved by modifying the Unity rendering environment.
Keyword (in Japanese) (See Japanese page) 
(in English) Reflection / Refraction / Gomputer-Generated Hologram / Point Cloud / Ray Tracing / / /  
Reference Info. ITE Tech. Rep., vol. 48, no. 8, AIT2024-41, pp. 37-40, March 2024.
Paper # AIT2024-41 
Date of Issue 2024-02-27 (AIT) 
ISSN Online edition: ISSN 2424-1970
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Conference Information
Committee AIT IIEEJ AS CG-ARTS  
Conference Date 2024-03-05 - 2024-03-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Expressive Japan 2024 
Paper Information
Registration To AIT 
Conference Code 2024-03-AIT-IIEEJ-AS-ARTS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Point cloud generation for computer-generated hologram including transmission and refraction 
Sub Title (in English) Fast generation with Unity 
Keyword(1) Reflection  
Keyword(2) Refraction  
Keyword(3) Gomputer-Generated Hologram  
Keyword(4) Point Cloud  
Keyword(5) Ray Tracing  
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1st Author's Name Motoya Kayamori  
1st Author's Affiliation Nihon University (Nihon Univ.)
2nd Author's Name Takeshi Yamaguchi  
2nd Author's Affiliation Nihon University (Nihon Univ.)
3rd Author's Name Hiroshi Yoshikawa  
3rd Author's Affiliation Nihon University (Nihon Univ.)
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Speaker Author-1 
Date Time 2024-03-05 11:48:00 
Presentation Time 12 minutes 
Registration for AIT 
Paper # AIT2024-41 
Volume (vol) vol.48 
Number (no) no.8 
Page pp.37-40 
#Pages
Date of Issue 2024-02-27 (AIT) 


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