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Paper Abstract and Keywords
Presentation 2008-01-24 11:10
A Scrambling Method for Motion JPEG Movies Enabling Detection of Moving Objects from Scrambled Movies
Keijiro Kuroiwa, Masaaki Fujiyoshi, Hitoshi Kiya (Tokyo Metro. Univ.) SIP2007-137 RCS2007-140
Abstract (in Japanese) (See Japanese page) 
(in English) This paper proposes a scrambling method for Motion JPEG movies and moving objects detection from scrambled movies. In the proposed method, both scrambling and moving objects detection utilizes the property of the positive and negative sign of discrete cosine transformed (DCT) coefficients. Since the positive and negative sign of a DCT coefficient is encoded separately from its corresponding magnitude, the sign is processed without decoding a Motion JPEG movie. This feature makes the proposed method fast. The scrambling strength is easily controlled and the codestream length never changes by scrambling in the proposed method, because this method only inverts the positive and negative sign bits to scramble movies. Moreover, the proposed method holds the relation of the positive and negative sign between two frames so that this method is able to detect moving objects from scrambled movies. The proposed method can further scramble the detected moving objects. In addition, descrambling of moving objects never require either the position or the shape of the objects to be descrambled.
Keyword (in Japanese) (See Japanese page) 
(in English) Privacy / Camera surveillance / AC coefficients / Pseudo random bit pattern / / / /  
Reference Info. IEICE Tech. Rep., vol. 107, no. 438, SIP2007-137, pp. 37-42, Jan. 2008.
Paper # SIP2007-137 
Date of Issue 2008-01-17 (SIP, RCS) 
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)
Download PDF SIP2007-137 RCS2007-140

Conference Information
Committee RCS SIP  
Conference Date 2008-01-24 - 2008-01-25 
Place (in Japanese) (See Japanese page) 
Place (in English) Hiroshima City Uni. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To SIP 
Conference Code 2008-01-RCS-SIP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) A Scrambling Method for Motion JPEG Movies Enabling Detection of Moving Objects from Scrambled Movies 
Sub Title (in English)  
Keyword(1) Privacy  
Keyword(2) Camera surveillance  
Keyword(3) AC coefficients  
Keyword(4) Pseudo random bit pattern  
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Keyword(6)  
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1st Author's Name Keijiro Kuroiwa  
1st Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
2nd Author's Name Masaaki Fujiyoshi  
2nd Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
3rd Author's Name Hitoshi Kiya  
3rd Author's Affiliation Tokyo Metropolitan University (Tokyo Metro. Univ.)
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Speaker Author-1 
Date Time 2008-01-24 11:10:00 
Presentation Time 25 minutes 
Registration for SIP 
Paper # SIP2007-137, RCS2007-140 
Volume (vol) vol.107 
Number (no) no.438(SIP), no.440(RCS) 
Page pp.37-42 
#Pages 6 
Date of Issue 2008-01-17 (SIP, RCS) 

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