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Paper Abstract and Keywords
Presentation 2012-12-13 11:00
Chroma Enhancement Method Considering Effect of Lightness and Hue
Go Tanaka (Nagoya City Univ.) SIS2012-32
Abstract (in Japanese) (See Japanese page) 
(in English) Lightness, chroma, and hue are defined as independent values each other in the CIELAB or CIELUV color spaces. However, the Helmholtz-Kohlrausch (H-K) effect---vivid colors are perceived as brighter than dull colors which have same lightness---is known. Therefore, in those color spaces, perceived lightness is increased even if chroma is only increased. In this report, the chroma enhancement method which preserves perceptual lightness is proposed considering the H-K effect. The proposed method preserves hues in an input image to keep naturalness of the image. The effectiveness of the proposed method is shown by experiments.
Keyword (in Japanese) (See Japanese page) 
(in English) Helmholtz-Kohlrausch effect / chroma enhancement / color image / color gamut / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 348, SIS2012-32, pp. 19-22, Dec. 2012.
Paper # SIS2012-32 
Date of Issue 2012-12-06 (SIS) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
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)
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Conference Information
Committee SIS  
Conference Date 2012-12-13 - 2012-12-14 
Place (in Japanese) (See Japanese page) 
Place (in English) Nihon University Tsudanuma Campus 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIS 
Conference Code 2012-12-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Chroma Enhancement Method Considering Effect of Lightness and Hue 
Sub Title (in English)  
Keyword(1) Helmholtz-Kohlrausch effect  
Keyword(2) chroma enhancement  
Keyword(3) color image  
Keyword(4) color gamut  
1st Author's Name Go Tanaka  
1st Author's Affiliation Nagoya City University (Nagoya City Univ.)
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Date Time 2012-12-13 11:00:00 
Presentation Time 20 
Registration for SIS 
Paper # IEICE-SIS2012-32 
Volume (vol) IEICE-112 
Number (no) no.348 
Page pp.19-22 
#Pages IEICE-4 
Date of Issue IEICE-SIS-2012-12-06 

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