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Paper Abstract and Keywords
Presentation 2025-03-06 11:10
Color Image Enhancement Method Based on Convex Combination Coefficients Transformation Using CIELAB Color Space
Keita Murayama, Yoshiaki Ueda (Ryukoku Univ.) SIS2024-46
Abstract (in Japanese) (See Japanese page) 
(in English) The HSV color space is generally used for color image enhancement. However, since the HSV color space does not take into account human visual perception, it is difficult to perform appropriate intensity contrast enhancement. In this report, we propose a method for color image enhancement using the CIELAB color space, which is one of the uniform color space that quantitatively expresses the differences in colors perceived by humans. A pixel in a image is represented by a convex combination in the CIELAB color space, defining four components: white, black, high intensity pure color, and low intensity pure color. The image intensity contrast and saturation are enhanced by transforming the histogram of the coefficients corresponding to each component so that it approaches the target histogram calculated from the uniform distribution in the CIELAB color space.
Keyword (in Japanese) (See Japanese page) 
(in English) color image enhancement / convex combination / CIELAB color space / histogram specification / / / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 418, SIS2024-46, pp. 13-18, March 2025.
Paper # SIS2024-46 
Date of Issue 2025-02-27 (SIS) 
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 SIS2024-46

Conference Information
Committee SIS  
Conference Date 2025-03-06 - 2025-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Soft computing, etc. 
Paper Information
Registration To SIS 
Conference Code 2025-03-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Color Image Enhancement Method Based on Convex Combination Coefficients Transformation Using CIELAB Color Space 
Sub Title (in English)  
Keyword(1) color image enhancement  
Keyword(2) convex combination  
Keyword(3) CIELAB color space  
Keyword(4) histogram specification  
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1st Author's Name Keita Murayama  
1st Author's Affiliation Ryukoku University (Ryukoku Univ.)
2nd Author's Name Yoshiaki Ueda  
2nd Author's Affiliation Ryukoku University (Ryukoku Univ.)
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Speaker Author-1 
Date Time 2025-03-06 11:10:00 
Presentation Time 20 minutes 
Registration for SIS 
Paper # SIS2024-46 
Volume (vol) vol.124 
Number (no) no.418 
Page pp.13-18 
#Pages 6 
Date of Issue 2025-02-27 (SIS) 

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