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Paper Abstract and Keywords
Presentation 2009-09-17 13:00
Rea-time detection of rotated patterns using FPGA
Yoshifumi Tanida, Tsutomu Maruyama (Tsukuba Univ.) RECONF2009-19
Abstract (in Japanese) (See Japanese page) 
(in English) In this paper, we describe an approach for real-time detection of
rotated patterns in an image using FPGA.
In many approaches, a two-dimensional pattern and the target regions in
the image are transformed to one-dimensional arrays or several pattern
specific values which are invariant to rotation, and the regions in
which the pattern may exist are listed up using them.
These approaches make it possible to narrow down the candidate regions
with less computational cost, but the sensitivity depends on how to
define the transform method.
In our approach, each region in a given image is directly compared with
a sequence of the rotated patterns using direct cross-correlation, and
the positions and rotation angles of the patterns in the image can be
found during a scan.
This approach requires high computational cost, but by calculating the
cross-correlations of a region and the sequence of the rotated patterns
incrementally starting from the non-rotated pattern, and by reducing the
number of the operations for the cross-correlation considering the
equality of the pixel values in the pattern, it becomes possible to
realize real-time detection of the rotated patterns with one FPGA.
Keyword (in Japanese) (See Japanese page) 
(in English) FPGA / image processing / / / / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 198, RECONF2009-19, pp. 1-6, Sept. 2009.
Paper # RECONF2009-19 
Date of Issue 2009-09-10 (RECONF) 
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 RECONF2009-19

Conference Information
Committee RECONF  
Conference Date 2009-09-17 - 2009-09-18 
Place (in Japanese) (See Japanese page) 
Place (in English) Utsunomiya Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Reconfigurable Sysytems, etc. 
Paper Information
Registration To RECONF 
Conference Code 2009-09-RECONF 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Rea-time detection of rotated patterns using FPGA 
Sub Title (in English)  
Keyword(1) FPGA  
Keyword(2) image processing  
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1st Author's Name Yoshifumi Tanida  
1st Author's Affiliation Tsukuba University (Tsukuba Univ.)
2nd Author's Name Tsutomu Maruyama  
2nd Author's Affiliation Tsukuba University (Tsukuba Univ.)
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Speaker Author-1 
Date Time 2009-09-17 13:00:00 
Presentation Time 25 minutes 
Registration for RECONF 
Paper # RECONF2009-19 
Volume (vol) vol.109 
Number (no) no.198 
Page pp.1-6 
#Pages 6 
Date of Issue 2009-09-10 (RECONF) 

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