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Paper Abstract and Keywords
Presentation 2012-06-14 14:40
A Proposal of Colorization Method for Monochrome Image by Color Transfer Based on Pattern Matching
Chiaki Ueda (Yamaguchi Univ.), Kazuhiro Tokunaga (FLSI), Noriaki Suetake, Eiji Uchino (Yamaguchi Univ.) SIS2012-8
Abstract (in Japanese) (See Japanese page) 
(in English) In this report, in order to realize automatic and photorealistic colorization of a monochrome image, a new colorization method is proposed. In this method, firstly, a reference color image including the subjects similar to those of the monochrome image should be prepared beforehand. Then, the input monochrome image is colored by using the colors obtained by the local lightness pattern matching between the lightness adjusted monochrome image and the color image. In order to improve the processing speed, the images are reduced their sizes in the pattern matching process. And to mitigate the image quality degradation, the color modification based on the lightness ratio of the resized colored image and the original monochrome image is achieved. Finally, unnatural colorization results are modified by the cross bilateral filter and the lightness ratio-based color modification. In this study, the colorization experiments using various natural images are done, and the resultant images are evaluated by the paired comparison test. Through the test results, the effectiveness of the proposed method is confirmed.
Keyword (in Japanese) (See Japanese page) 
(in English) color transform / lightness pattern matching / cross bilateral filter / / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 78, SIS2012-8, pp. 41-46, June 2012.
Paper # SIS2012-8 
Date of Issue 2012-06-07 (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 2012-06-14 - 2012-06-15 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokachi Plaza (Obihiro City) 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIS 
Conference Code 2012-06-SIS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Proposal of Colorization Method for Monochrome Image by Color Transfer Based on Pattern Matching 
Sub Title (in English)  
Keyword(1) color transform  
Keyword(2) lightness pattern matching  
Keyword(3) cross bilateral filter  
1st Author's Name Chiaki Ueda  
1st Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
2nd Author's Name Kazuhiro Tokunaga  
2nd Author's Affiliation Fuzzy Logic System Institute (FLSI)
3rd Author's Name Noriaki Suetake  
3rd Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
4th Author's Name Eiji Uchino  
4th Author's Affiliation Yamaguchi University (Yamaguchi Univ.)
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Speaker Author-1 
Date Time 2012-06-14 14:40:00 
Presentation Time 20 minutes 
Registration for SIS 
Paper # SIS2012-8 
Volume (vol) vol.112 
Number (no) no.78 
Page pp.41-46 
Date of Issue 2012-06-07 (SIS) 

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