Paper Abstract and Keywords |
Presentation |
2009-05-28 11:00
Detecting Nonlinearly-Resized JPEG Images by Analyzing High-Frequency Elements in DCT Coefficients Tomoaki Matsunami, Toshihiko Yamasaki, Kiyoharu Aizawa (Univ. of Tokyo) IE2009-12 PRMU2009-3 MI2009-3 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In this paper, we propose a method for detecting nonlinearly-resized JPEG images. We defined 8x8 periodic blocks as JPEG blocks. JPEG block boundaries are detected applying 8x8 block DCT to all the pixels of the input image and analyzing the high-frequency coefficients in them. If the JPEG block boundaries are not periodic by 8x8, the image is regarded as “forgery”. In order to quantitatively analyze the degree of forgery, we have developed two approaches such as truth-score method and correlation-score method. Experimental results using 375 original (untouched) images and 375 nonlinearly-resized images demonstrated that our proposed method can classify them with over 90% of accuracy. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Image Forensics / Forgery Detection / JPEG Compression / DCT / / / / |
Reference Info. |
IEICE Tech. Rep., vol. 109, no. 63, IE2009-12, pp. 11-16, May 2009. |
Paper # |
IE2009-12 |
Date of Issue |
2009-05-21 (IE, PRMU, MI) |
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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IE2009-12 PRMU2009-3 MI2009-3 |
Conference Information |
Committee |
PRMU IE MI |
Conference Date |
2009-05-28 - 2009-05-29 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Gifu Univ. |
Topics (in Japanese) |
(See Japanese page) |
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Paper Information |
Registration To |
IE |
Conference Code |
2009-05-PRMU-IE-MI |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Detecting Nonlinearly-Resized JPEG Images by Analyzing High-Frequency Elements in DCT Coefficients |
Sub Title (in English) |
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Keyword(1) |
Image Forensics |
Keyword(2) |
Forgery Detection |
Keyword(3) |
JPEG Compression |
Keyword(4) |
DCT |
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1st Author's Name |
Tomoaki Matsunami |
1st Author's Affiliation |
the University of Tokyo (Univ. of Tokyo) |
2nd Author's Name |
Toshihiko Yamasaki |
2nd Author's Affiliation |
the University of Tokyo (Univ. of Tokyo) |
3rd Author's Name |
Kiyoharu Aizawa |
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the University of Tokyo (Univ. of Tokyo) |
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Speaker |
Author-1 |
Date Time |
2009-05-28 11:00:00 |
Presentation Time |
30 minutes |
Registration for |
IE |
Paper # |
IE2009-12, PRMU2009-3, MI2009-3 |
Volume (vol) |
vol.109 |
Number (no) |
no.63(IE), no.64(PRMU), no.65(MI) |
Page |
pp.11-16 |
#Pages |
6 |
Date of Issue |
2009-05-21 (IE, PRMU, MI) |
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