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Paper Abstract and Keywords
Presentation 2026-06-02 10:05
A study on chromaticity modulation based on pixel-level color difference in display-to-camera communication
Kosuke Iwasaki, Kentaro Kobayashi (Meijo Univ.) WBS2026-10 RCC2026-10 MICT2026-10
Abstract (in Japanese) (See Japanese page) 
(in English) This paper investigates visible light communication systems using digital signage displays and image sensors, such as smartphone cameras. Since this system embeds signals as chromaticity variations, a trade-off between communication quality and visual quality poses a significant challenge, as conventional uniform-intensity methods cause localized excessive color differences or insufficient signal intensity. We propose an imperceptible modulation method based on pixel-level color difference that individually optimizes signal intensity for each pixel. Additionally, we introduce a demodulation method based on normalized cross-correlation (NCC) to evaluate distribution similarity within signal cells. This study clarifies how these methods improve visual quality uniformity and communication performance.
Keyword (in Japanese) (See Japanese page) 
(in English) Visible light communication / Digital signage / Image sensor / YCbCr color space / Color difference / / /  
Reference Info. IEICE Tech. Rep., vol. 126, no. 46, WBS2026-10, pp. 44-49, June 2026.
Paper # WBS2026-10 
Date of Issue 2026-05-25 (WBS, RCC, MICT) 
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 WBS2026-10 RCC2026-10 MICT2026-10

Conference Information
Committee RCC MICT WBS  
Conference Date 2026-06-01 - 2026-06-02 
Place (in Japanese) (See Japanese page) 
Place (in English) Yokosuka Research Park(YRP) 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Reliable Communication and Control, Healthcare and Medical Information Communication Technologies, Coding, Modulation, Signal processing and General 
Paper Information
Registration To WBS 
Conference Code 2026-06-RCC-MICT-WBS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A study on chromaticity modulation based on pixel-level color difference in display-to-camera communication 
Sub Title (in English)  
Keyword(1) Visible light communication  
Keyword(2) Digital signage  
Keyword(3) Image sensor  
Keyword(4) YCbCr color space  
Keyword(5) Color difference  
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Keyword(8)  
1st Author's Name Kosuke Iwasaki  
1st Author's Affiliation Meijo University (Meijo Univ.)
2nd Author's Name Kentaro Kobayashi  
2nd Author's Affiliation Meijo University (Meijo Univ.)
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Speaker Author-1 
Date Time 2026-06-02 10:05:00 
Presentation Time 25 minutes 
Registration for WBS 
Paper # WBS2026-10, RCC2026-10, MICT2026-10 
Volume (vol) vol.126 
Number (no) no.46(WBS), no.47(RCC), no.48(MICT) 
Page pp.44-49 
#Pages 6 
Date of Issue 2026-05-25 (WBS, RCC, MICT) 

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