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Paper Abstract and Keywords
Presentation 2012-12-07 09:35
rotate calibration of hemispherical photographs
Takahiro Sakurai, Mamoru Kubo (Kanazawa Univ), Naoto Kamata (Univ. Tokyo) CS2012-87 IE2012-101
Abstract (in Japanese) (See Japanese page) 
(in English) Hemispherical photography has become a widely used tool for the estimation of forest structural attributes and seasonal change of crown.
Photographs of canopy were taken looking upwards from the forest floor, using a digital camera with 180° fisheye lens.
The fisheye camera was mounted vertically on a tripod
using the two dimensional level and the orientation of image was turned
to North using the compass. However, camera calibration was necessary for the exact registration of seasonal images.
In this study, we proposed the method for rotate calibration of fisheye camera by using a nonlinear optimization.
Keyword (in Japanese) (See Japanese page) 
(in English) hemispherical photographs / otation parameters / camera calibration / Levenberg-Marquardt method / / / /  
Reference Info. IEICE Tech. Rep., vol. 112, no. 335, IE2012-101, pp. 95-100, Dec. 2012.
Paper # IE2012-101 
Date of Issue 2012-11-29 (CS, IE) 
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 CS2012-87 IE2012-101

Conference Information
Committee ITE-BCT IPSJ-AVM CS IE  
Conference Date 2012-12-06 - 2012-12-07 
Place (in Japanese) (See Japanese page) 
Place (in English) Fukuisi-chiiki-kouryu-plaza 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Image Coding, Streaming, etc. 
Paper Information
Registration To IE 
Conference Code 2012-12-BCT-AVM-CS-IE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) rotate calibration of hemispherical photographs 
Sub Title (in English)  
Keyword(1) hemispherical photographs  
Keyword(2) otation parameters  
Keyword(3) camera calibration  
Keyword(4) Levenberg-Marquardt method  
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1st Author's Name Takahiro Sakurai  
1st Author's Affiliation Kanazawa University (Kanazawa Univ)
2nd Author's Name Mamoru Kubo  
2nd Author's Affiliation Kanazawa University (Kanazawa Univ)
3rd Author's Name Naoto Kamata  
3rd Author's Affiliation University of Tokyo (Univ. Tokyo)
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Speaker Author-1 
Date Time 2012-12-07 09:35:00 
Presentation Time 20 minutes 
Registration for IE 
Paper # CS2012-87, IE2012-101 
Volume (vol) vol.112 
Number (no) no.334(CS), no.335(IE) 
Page pp.95-100 
#Pages 6 
Date of Issue 2012-11-29 (CS, IE) 

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