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Paper Abstract and Keywords
Presentation 2015-03-03 09:00
[Poster Presentation] Image Interpolation based on Weighting Function of Gaussian
Takuro Yamaguchi, Yasuhiro Nakajima, Masaaki Ikehara (Keio Univ.) EA2014-105 SIP2014-146 SP2014-168
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we propose a new image interpolation method based on a 2-D piecewise stationary autoregressive (PAR) model. Soft-decision adaptive interpolation (SAI) and its improved methods which are based on PAR model are state-of-the-art methods in image interpolation. They produce upconverted images with good quality but tend to have high calculation cost because of solving the inverse matrix problem to estimate the weighting parameters. So we use Gaussian function to estimate parameters without the inverse matrix calculation and reduce the calculation cost. Moreover, parameters are estimated on pixel by pixel, while in SAI they are constant in a local window. Thanks to these, the proposed method outperforms SAI in the quality of upconversion with low calculation cost. Finally we validate the proposed method through some experimental results.
Keyword (in Japanese) (See Japanese page) 
(in English) image interpolation / Gaussian / PAR model / image modeling / / / /  
Reference Info. IEICE Tech. Rep., vol. 114, no. 474, SIP2014-146, pp. 181-185, March 2015.
Paper # SIP2014-146 
Date of Issue 2015-02-23 (EA, SIP, SP) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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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 SIP EA SP  
Conference Date 2015-03-02 - 2015-03-03 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
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Paper Information
Registration To SIP 
Conference Code 2015-03-SIP-EA-SP 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Image Interpolation based on Weighting Function of Gaussian 
Sub Title (in English)  
Keyword(1) image interpolation  
Keyword(2) Gaussian  
Keyword(3) PAR model  
Keyword(4) image modeling  
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1st Author's Name Takuro Yamaguchi  
1st Author's Affiliation Keio University (Keio Univ.)
2nd Author's Name Yasuhiro Nakajima  
2nd Author's Affiliation Keio University (Keio Univ.)
3rd Author's Name Masaaki Ikehara  
3rd Author's Affiliation Keio University (Keio Univ.)
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Speaker Author-1 
Date Time 2015-03-03 09:00:00 
Presentation Time 90 minutes 
Registration for SIP 
Paper # EA2014-105, SIP2014-146, SP2014-168 
Volume (vol) vol.114 
Number (no) no.473(EA), no.474(SIP), no.475(SP) 
Page pp.181-185 
#Pages
Date of Issue 2015-02-23 (EA, SIP, SP) 


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