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Paper Abstract and Keywords
Presentation 2026-03-17 11:15
High-speed reconstruction of 4D light fields on multiple monitors for virtual transparency of visual obstructions
Tessei Watanabe (TUS), Kazuya Kodama (NII), Takayuki Hamamoto (TUS) IMQ2025-80 IE2025-157 MVE2025-87
Abstract (in Japanese) (See Japanese page) 
(in English) Virtual transparency of visual obstructions can be achieved by light field transmission based on a combination of acquisition and reproduction for 3D visual media. In order to develop an inexpensive system toward virtual transparency, we have previously proposed real-time reconstruction of entire 4D light fields suitable for glassless multi-view displays from point cloud data acquired by a single RGB-D camera. Actually, by applying appropriate geometrical transformation to the acquired RGB-D data, we obtain a simple 3D array while effectively reducing their redundancy. Moreover, each sub-aperture image on 4D light fields can be reconstructed only by structured analysis searching parallel lines within the 3D array, where its computational cost is significantly suppressed. In this paper, we newly implement high-speed reconstruction of 4D light fields on a GPU for massive light field reproduction with multiple monitors, where we also show it can be achieved in real time. Specifically, parallel processing suitable to GPUs is introduced into all the procedures of our method, where computationally expensive search of our 3D array is significantly accelerated by utlizing its alpha channel to achieve more efficient light field reconstruction without suffering from memory access latency. We demonstrate that our novel implementation works in real time even for multiple monitors reproducing larger light fields with higher-resolution.
Keyword (in Japanese) (See Japanese page) 
(in English) light field / depth camera / point cloud / real-time / augmented reality / / /  
Reference Info. IEICE Tech. Rep., vol. 125, no. 410, IE2025-157, pp. 340-345, March 2026.
Paper # IE2025-157 
Date of Issue 2026-03-09 (IMQ, IE, MVE) 
ISSN Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF IMQ2025-80 IE2025-157 MVE2025-87

Conference Information
Committee CQ MVE IMQ IE  
Conference Date 2026-03-16 - 2026-03-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Okinawa-Sangyoushien-Center 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To IE 
Conference Code 2026-03-CQ-MVE-IMQ-IE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) High-speed reconstruction of 4D light fields on multiple monitors for virtual transparency of visual obstructions 
Sub Title (in English)  
Keyword(1) light field  
Keyword(2) depth camera  
Keyword(3) point cloud  
Keyword(4) real-time  
Keyword(5) augmented reality  
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Keyword(7)  
Keyword(8)  
1st Author's Name Tessei Watanabe  
1st Author's Affiliation Tokyo University of Science (TUS)
2nd Author's Name Kazuya Kodama  
2nd Author's Affiliation National Institute of Informatics (NII)
3rd Author's Name Takayuki Hamamoto  
3rd Author's Affiliation Tokyo University of Science (TUS)
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Speaker Author-1 
Date Time 2026-03-17 11:15:00 
Presentation Time 20 minutes 
Registration for IE 
Paper # IMQ2025-80, IE2025-157, MVE2025-87 
Volume (vol) vol.125 
Number (no) no.408(IMQ), no.410(IE), no.411(MVE) 
Page pp.340-345 
#Pages 6 
Date of Issue 2026-03-09 (IMQ, IE, MVE) 

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