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Paper Abstract and Keywords
Presentation 2022-01-24 12:40
Acceleration of Bilateral Filter by Approximating Gaussian Weight Calculation
Fumiya Kojima (NITech), Yoshihiro Maeda (TUS), Norishige Fukushima (NITech) IE2021-33
Abstract (in Japanese) (See Japanese page) 
(in English) Bilateral filter is a typical edge-preserving smoothing filter that uses a Gaussian distribution.The Gaussian distribution is the basic distribution used in image processing and is often used as weights in convolution and image processing.The Gaussian distribution can be computed by the exp function, but this computation is heavier than usual and needs to be accelerated.A typical speed-up method is to use a LUT to store the precomputed results. However, in the case of bilateral filters, the value changes depending on the pixel, so efficient table referencing is not possible.There is also the problem of the need for quantization when convolving floating point signals.In this study, we propose a method to speed up the calculation of bilateral filter weights by approximate calculation.The results of approximations using the defining equation of the exp function and polynomial approximations were compared, and it was confirmed that the approximate calculation works faster than the LUT reference.
Keyword (in Japanese) (See Japanese page) 
(in English) Bilateral filter / Gaussian distribution / Acceleration / / / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 346, IE2021-33, pp. 33-38, Jan. 2022.
Paper # IE2021-33 
Date of Issue 2022-01-17 (IE) 
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 IE  
Conference Date 2022-01-24 - 2022-01-24 
Place (in Japanese) (See Japanese page) 
Place (in English) National Institute of Informatics 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image Processing, Image Coding, etc. 
Paper Information
Registration To IE 
Conference Code 2022-01-IE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Acceleration of Bilateral Filter by Approximating Gaussian Weight Calculation 
Sub Title (in English)  
Keyword(1) Bilateral filter  
Keyword(2) Gaussian distribution  
Keyword(3) Acceleration  
1st Author's Name Fumiya Kojima  
1st Author's Affiliation Nagoya Institute of Technology (NITech)
2nd Author's Name Yoshihiro Maeda  
2nd Author's Affiliation Tokyo University of Science (TUS)
3rd Author's Name Norishige Fukushima  
3rd Author's Affiliation Nagoya Institute of Technology (NITech)
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Speaker Author-1 
Date Time 2022-01-24 12:40:00 
Presentation Time 25 minutes 
Registration for IE 
Paper # IE2021-33 
Volume (vol) vol.121 
Number (no) no.346 
Page pp.33-38 
Date of Issue 2022-01-17 (IE) 

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