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Paper Abstract and Keywords
Presentation 2022-03-10 15:50
Visual Constraints for Generating Multi-domain Offline Handwritten Mathematical Expressions
Huy Quang Ung, Hung Tuan Nguyen, Cuong Tuan Nguyen (Tokyo Univ. Agri. & Tech.), Tsunenori Ishioka (The National Cen. for Univ. Entrance Exam.), Masaki Nakagawa (Tokyo Univ. Agri. & Tech.) PRMU2021-69
Abstract (in Japanese) (See Japanese page) 
(in English) Offline Handwritten Mathematical Expression (HME) recognition has been intensively studied for two decades. However, most studies have worked on rendered images of online HMEs (Rendered Domain, or RD in short), but not on optically scanned HME images (Optical Domain, or OD in short). Due to a large gap between these two domains, it is challenging to use an HME recognizer trained in RD to recognize patterns in OD. To utilize a recognizer of RD in recognizing OD patterns, we propose a visual constrained CycleGAN (CCycleGAN) model to generate synthetic OD patterns from RD patterns and vice versa. For the RD-to-OD direction, we train a new recognizer of OD using the synthetic patterns. For the OD-to-RD direction, we utilize a pre-trained HME recognizer of RD to recognize the synthetic RD patterns generated from the OD patterns. Our experiments show that the CCycleGAN model performs significantly better than the CycleGAN model in terms of recognition accuracy. The recognition results demonstrate the effectiveness of our method in recognizing OD patterns using labeled RD patterns and unlabeled OD patterns for training. In addition, our CCycleGAN can well perform even when using only 100 training patterns in OD.
Keyword (in Japanese) (See Japanese page) 
(in English) Offline / Handwritten mathematical expression / CycleGAN / Generation / Visual losses / / /  
Reference Info. IEICE Tech. Rep., vol. 121, no. 427, PRMU2021-69, pp. 54-59, March 2022.
Paper # PRMU2021-69 
Date of Issue 2022-03-03 (PRMU) 
ISSN Online edition: ISSN 2432-6380
Copyright
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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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Conference Information
Committee PRMU IPSJ-CVIM  
Conference Date 2022-03-10 - 2022-03-11 
Place (in Japanese) (See Japanese page) 
Place (in English) Online 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Differentiable rendering 
Paper Information
Registration To PRMU 
Conference Code 2022-03-PRMU-CVIM 
Language English 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Visual Constraints for Generating Multi-domain Offline Handwritten Mathematical Expressions 
Sub Title (in English)  
Keyword(1) Offline  
Keyword(2) Handwritten mathematical expression  
Keyword(3) CycleGAN  
Keyword(4) Generation  
Keyword(5) Visual losses  
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1st Author's Name Huy Quang Ung  
1st Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. Agri. & Tech.)
2nd Author's Name Hung Tuan Nguyen  
2nd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. Agri. & Tech.)
3rd Author's Name Cuong Tuan Nguyen  
3rd Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. Agri. & Tech.)
4th Author's Name Tsunenori Ishioka  
4th Author's Affiliation The National Center for University Entrance Examinations (The National Cen. for Univ. Entrance Exam.)
5th Author's Name Masaki Nakagawa  
5th Author's Affiliation Tokyo University of Agriculture and Technology (Tokyo Univ. Agri. & Tech.)
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Speaker Author-1 
Date Time 2022-03-10 15:50:00 
Presentation Time 15 minutes 
Registration for PRMU 
Paper # PRMU2021-69 
Volume (vol) vol.121 
Number (no) no.427 
Page pp.54-59 
#Pages
Date of Issue 2022-03-03 (PRMU) 


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