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Paper Abstract and Keywords
Presentation 2020-06-03 13:00
Luminance-Independent Hue Image Generation Method Based on CIELAB Color Space
Yuma Kinoshita, Hitoshi Kiya (Tokyo Metro. Univ.) SIS2020-1
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose luminance-independent hue-image generation method based on the CIELAB color space, from RAW images taken by commonly-used digital cameras. The color constancy of human vision has not been reproduced on a computer yet. In other words, colors of images captured by cameras are affected by lighting conditions at the time of shooting. Furthermore, non-linear operations in the cameras change colors of resulting RGB images. In the proposed method, the white balance is adjusted precisely according to a lighting condition of scene and then the brightness and saturation in CIELAB color space are equalized. The proposed method enables us to display the hue information of a scene appropriately on a typical display because pixel values are processed in the proposed method so that all pixel values of a final hue image are within the sRGB color gamut. A hue image generation experiment using two pairs of real images show that the proposed method can produce a hue image without the effect of luminance.
Keyword (in Japanese) (See Japanese page) 
(in English) Color Image Processing / Color Cnstancy / CIELAB Color Space / RGB Color Space / Hue Image / / /  
Reference Info. IEICE Tech. Rep., vol. 120, no. 51, SIS2020-1, pp. 1-6, June 2020.
Paper # SIS2020-1 
Date of Issue 2020-05-27 (SIS) 
ISSN 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
Conference Date 2020-06-03 - 2020-06-04 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Intelligent Multimedia Systems, Applied Enbedded Systems, Three-Dimensional Image Technology (3DIT), etc. 
Paper Information
Registration To SIS 
Conference Code 2020-06-SIS-AVM-3DIT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Luminance-Independent Hue Image Generation Method Based on CIELAB Color Space 
Sub Title (in English)  
Keyword(1) Color Image Processing  
Keyword(2) Color Cnstancy  
Keyword(3) CIELAB Color Space  
Keyword(4) RGB Color Space  
Keyword(5) Hue Image  
1st Author's Name Yuma Kinoshita  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
2nd Author's Name Hitoshi Kiya  
2nd Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
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Speaker Author-1 
Date Time 2020-06-03 13:00:00 
Presentation Time 20 minutes 
Registration for SIS 
Paper # SIS2020-1 
Volume (vol) vol.120 
Number (no) no.51 
Page pp.1-6 
Date of Issue 2020-05-27 (SIS) 

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