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Paper Abstract and Keywords
Presentation 2019-11-05 09:20
[Short Paper] Evaluating image quality of nonlocal total variation and nonlocal means filter based Compressed Sensing in sparse-view CT
Yongchae Kim, Katsuya Fujii, Hiroyuki Kudo (Tsukuba Univ.) MICT2019-23 MI2019-50
Abstract (in Japanese) (See Japanese page) 
(in English) TV(Total Variation) is studied most widely in the field of X-ray CT image reconstruction. However, TV considers only adjacent pixels, the staircase artifacts appear in the reconstructed image. To avoid the staircase artifact problem, in 2016, Dong and Kudo proposed compressed sensing (NLF-CS) using a nonlocal means filter, which is one of the nonlinear filters, and showed that it had a significant image quality improvement. On the other hand, as an extended version of TV, nonlocal TV also exists to consider the difference of the pixel pair in the window. NLF-CS and nonlocal TV tend to generate similar reconstructed images but the two are mathematically different. They are often confused because there has been no research comparing image quality. In this paper, we discuss the image quality of NLF-CS and nonlocal TV in sparse-view CT.
Keyword (in Japanese) (See Japanese page) 
(in English) Image reconstruction / Compressed sensing / Nonlocal Total Variation / Weighted median / / / /  
Reference Info. IEICE Tech. Rep., vol. 119, no. 264, MI2019-50, pp. 1-4, Nov. 2019.
Paper # MI2019-50 
Date of Issue 2019-10-29 (MICT, MI) 
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)
Download PDF MICT2019-23 MI2019-50

Conference Information
Committee MI MICT  
Conference Date 2019-11-05 - 2019-11-05 
Place (in Japanese) (See Japanese page) 
Place (in English) Univ. of Tsukuba 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Medical imaging technology, healthcare and medical information communication technology 
Paper Information
Registration To MI 
Conference Code 2019-11-MI-MICT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Evaluating image quality of nonlocal total variation and nonlocal means filter based Compressed Sensing in sparse-view CT 
Sub Title (in English)  
Keyword(1) Image reconstruction  
Keyword(2) Compressed sensing  
Keyword(3) Nonlocal Total Variation  
Keyword(4) Weighted median  
1st Author's Name Yongchae Kim  
1st Author's Affiliation University of Tsukuba (Tsukuba Univ.)
2nd Author's Name Katsuya Fujii  
2nd Author's Affiliation University of Tsukuba (Tsukuba Univ.)
3rd Author's Name Hiroyuki Kudo  
3rd Author's Affiliation University of Tsukuba (Tsukuba Univ.)
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Date Time 2019-11-05 09:20:00 
Presentation Time 20 
Registration for MI 
Paper # IEICE-MICT2019-23,IEICE-MI2019-50 
Volume (vol) IEICE-119 
Number (no) no.263(MICT), no.264(MI) 
Page pp.1-4 
#Pages IEICE-4 
Date of Issue IEICE-MICT-2019-10-29,IEICE-MI-2019-10-29 

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