Paper Abstract and Keywords |
Presentation |
2012-03-08 10:30
Quality Improvement of JPEG Images by Re-application of JPEG and Image Database Katsuya Kohno, Akira Tanaka (Hokkaido Univ.) CAS2011-109 SIP2011-129 CS2011-101 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Image compression is one of important technologies in the fields of
image processing in terms of efficient transmission and storing of
images.
Since there exist efficient image compression methods today, we can
compress a given image by those methods efficiently.
However, many existing compressed images were compressed by
the conventional JPEG.
Thus, we need a technique for improving the quality of JPEG images
especially with low bit-rates.
Many methods for improving the quality of JPEG images have been
proposed.
Among them, a method based on re-application of JPEG is recognized as
one of efficient methods.
The key idea of this method is adopting a weighted sum of images
constructed by re-application of JPEG, which means compression and
decoding, to various shifted version of a given JPEG image.
In this paper, we propose a method for constructing a better weights
for the weighted sum of images in order to improve the performance of
the method based on re-application of JPEG, incorporating a image
database and novel distance measures between two images.
We also show some results of numerical examples in order to verify the
efficacy of the proposed method. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
JPEG / image quality improvement / re-application of JPEG / image database / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 111, no. 466, SIP2011-129, pp. 13-18, March 2012. |
Paper # |
SIP2011-129 |
Date of Issue |
2012-03-01 (CAS, SIP, CS) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
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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CAS2011-109 SIP2011-129 CS2011-101 |
Conference Information |
Committee |
CAS CS SIP |
Conference Date |
2012-03-08 - 2012-03-09 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
The University of Niigata |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
Network Processor, Signal Processing for communication, and Wireless LAN/PAN, etc. |
Paper Information |
Registration To |
SIP |
Conference Code |
2012-03-CAS-CS-SIP |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Quality Improvement of JPEG Images by Re-application of JPEG and Image Database |
Sub Title (in English) |
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Keyword(1) |
JPEG |
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image quality improvement |
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re-application of JPEG |
Keyword(4) |
image database |
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1st Author's Name |
Katsuya Kohno |
1st Author's Affiliation |
Hokkaido University (Hokkaido Univ.) |
2nd Author's Name |
Akira Tanaka |
2nd Author's Affiliation |
Hokkaido University (Hokkaido Univ.) |
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Speaker |
Author-1 |
Date Time |
2012-03-08 10:30:00 |
Presentation Time |
25 minutes |
Registration for |
SIP |
Paper # |
CAS2011-109, SIP2011-129, CS2011-101 |
Volume (vol) |
vol.111 |
Number (no) |
no.465(CAS), no.466(SIP), no.467(CS) |
Page |
pp.13-18 |
#Pages |
6 |
Date of Issue |
2012-03-01 (CAS, SIP, CS) |
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