Wataru Ohyama

According to our database, Wataru Ohyama authored at least 67 papers between 2000 and 2023.

Collaborative distances:

• Dijkstra number of four.
• Erdős number of four.

2023

Implementation of data-driven historical informatics research on Kao (Stylized Signature).

Satoru Nakamura, Guanwei Liu, Hajime Miyazaki, Satoshi Inoue, Wataru Ohyama, Taizo Yamada

Proceedings of the Annual International Conference of the Alliance of Digital Humanities Organizations, 2023

2021

Learning the micro deformations by max-pooling for offline signature verification.

Yuchen Zheng, Brian Kenji Iwana, Muhammad Imran Malik, Sheraz Ahmed, Wataru Ohyama, Seiichi Uchida

Pattern Recognit., 2021

2020

Joystick Car Drive System and its Application to Self-driving Microbus.

Zhi Wang, Hideyasu Sai, Kazuo Ogiwara, Wataru Ohyama, Daishi Watabe, Yukimichi Saitou, Masayoshi Wada

Proceedings of the 46th Annual Conference of the IEEE Industrial Electronics Society, 2020

Discriminative Metric Learning with Convolutional Feature Descriptors for Age-Invariant Face Recognition and Verification.

Wataru Ohyama, Yuta Somada, Nobu C. Shirai, Tetsushi Wakabayashi

Proceedings of the Frontiers of Computer Vision - 26th International Workshop, 2020

2019

Detecting Mathematical Expressions in Scientific Document Images Using a U-Net Trained on a Diverse Dataset.

Wataru Ohyama, Masakazu Suzuki, Seiichi Uchida

IEEE Access, 2019

RankSVM for Offline Signature Verification.

Yan Zheng, Yuchen Zheng, Wataru Ohyama, Daiki Suehiro, Seiichi Uchida

Proceedings of the 2019 International Conference on Document Analysis and Recognition, 2019

Capturing Micro Deformations from Pooling Layers for Offline Signature Verification.

Yuchen Zheng, Wataru Ohyama, Brian Kenji Iwana, Seiichi Uchida

Proceedings of the 2019 International Conference on Document Analysis and Recognition, 2019

Training Convolutional Autoencoders with Metric Learning.

Yosuke Onitsuka, Wataru Ohyama, Seiichi Uchida

Proceedings of the 2019 International Conference on Document Analysis and Recognition, 2019

Page Segmentation using a Convolutional Neural Network with Trainable Co-Occurrence Features.

Joonho Lee, Hideaki Hayashi, Wataru Ohyama, Seiichi Uchida

Proceedings of the 2019 International Conference on Document Analysis and Recognition, 2019

Scribbles for Metric Learning in Histological Image Segmentation.

Daisuke Harada, Ryoma Bise, Hiroki Tokunaga, Wataru Ohyama, Sanae Oka, Toshihiko Fujimori, Seiichi Uchida

Proceedings of the 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2019

Chart-Type Classification Using Convolutional Neural Network for Scholarly Figures.

Takeo Ishihara, Kento Morita, Nobu C. Shirai, Tetsushi Wakabayashi, Wataru Ohyama

Proceedings of the Pattern Recognition - 5th Asian Conference, 2019

2018

Extraction and Recognition of Shoe Logos with a Wide Variety of Appearance Using Two-Stage Classifiers.

Kazunori Aoki, Wataru Ohyama, Tetsushi Wakabayashi

IEICE Trans. Inf. Syst., 2018

2017

Recognition and defect detection of dot-matrix text via variation-model based learning.

Wataru Ohyama, Koushi Suzuki, Tetsushi Wakabayashi

Proceedings of the Thirteenth International Conference on Quality Control by Artificial Vision, 2017

Automatic extraction and recognition of shoe logos with a wide variety of appearance.

Kazunori Aoki, Wataru Ohyama, Tetsushi Wakabayashi

Proceedings of the Fifteenth IAPR International Conference on Machine Vision Applications, 2017

Detection and Recognition of Arabic Text in Video Frames.

Wataru Ohyama, Seiya Iwata, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 6th International Workshop on Multilingual OCR, 2017

Recognition and connection of moving captions in Arabic TV news.

Seiya Iwata, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 1st International Workshop on Arabic Script Analysis and Recognition, 2017

Age-Invariant Person Identification by Segmentation Verification of Face Image.

Yuta Somada, Wataru Ohyama, Tetsushi Wakabayashi

Proceedings of the 4th IAPR Asian Conference on Pattern Recognition, 2017

Multilingual-Signature Verification by Verifier Fusion Using Random Forests.

Keg Matsuda, Wataru Ohyama, Tetsushi Wakabayashi

Proceedings of the 4th IAPR Asian Conference on Pattern Recognition, 2017

2016

Recognition and transition frame detection of Arabic news captions for video retrieval.

Seiya Iwata, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 23rd International Conference on Pattern Recognition, 2016

Effective Random-Impostor Training for Combined Segmentation Signature Verification.

Keigo Matsuda, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 15th International Conference on Frontiers in Handwriting Recognition, 2016

2015

Efficient three dimensional rotation estimation for camera-based OCR.

Kanta Kuramoto, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 14th IAPR International Conference on Machine Vision Applications, 2015

Multilingual signature-verification by generalized combined segmentation verification.

Wataru Ohyama, Yuuki Ogi, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 13th International Conference on Document Analysis and Recognition, 2015

Efficient estimation of character normal direction for Camera-based OCR.

Kanta Kuramoto, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 13th International Conference on Document Analysis and Recognition, 2015

Facial features extraction by accelerated implementation of circular hough transform and appearance evaluation.

Hayato Iwasa, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 21st Korea-Japan Joint Workshop on Frontiers of Computer Vision, 2015

Rotated face recognition by manifold learning with auto-associative neural network.

Mizuki Ito, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 21st Korea-Japan Joint Workshop on Frontiers of Computer Vision, 2015

Spatiotemporal auto-correlation of grayscale gradient with importance map for cooking gesture recognition.

Wataru Ohyama, Soichiro Hotta, Tetsushi Wakabayashi

Proceedings of the 3rd IAPR Asian Conference on Pattern Recognition, 2015

2014

Improving Accuracy of Printed Character Recognition Using Hexagonal Zoning of Directional Histogram Feature.

Wataru Ohyama, Akihito Yamamoto, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 22nd International Conference on Pattern Recognition, 2014

Performance Improvement of Dot-Matrix Character Recognition by Variation Model Based Learning.

Koji Endo, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Computer Vision - ACCV 2014 Workshops, 2014

2013

ICDAR 2013 Competitions on Signature Verification and Writer Identification for On- and Offline Skilled Forgeries (SigWiComp 2013).

Muhammad Imran Malik, Marcus Liwicki, Linda Alewijnse, Wataru Ohyama, Michael Blumenstein, Bryan Found

Proceedings of the 12th International Conference on Document Analysis and Recognition, 2013

Automatic Chinese Text Classification Using Character-Based and Word-Based Approach.

Xi Luo, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 12th International Conference on Document Analysis and Recognition, 2013

Improvement of Japanese Signature Verification by Segmentation-Verification.

Yuta Kamihira, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 12th International Conference on Document Analysis and Recognition, 2013

Accuracy Improvement of Viewpoint-Free Scene Character Recognition by Rotation Angle Estimation.

Kanta Kuramoto, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Camera-Based Document Analysis and Recognition, 2013

Improvement of Japanese Signature Verification by Combined Segmentation Verification Approach.

Yuta Kamihira, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 2nd IAPR Asian Conference on Pattern Recognition, 2013

2012

A study on three dimensional rotation-free character recognition and rotation angle estimation of characters.

Ryo Narita, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 21st International Conference on Pattern Recognition, 2012

Detection of eyes by circular Hough transform and histogram of gradient.

Yasutaka Ito, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 21st International Conference on Pattern Recognition, 2012

Combination of Signature Verification Techniques by SVM.

Takashi Ito, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 2012 International Conference on Frontiers in Handwriting Recognition, 2012

Motion Tracking of Local Myocardial Tissue Using a DP+E Tracking Method on M-mode Echocardiograms.

Chen Chao, Naoka Masesako, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura, Kiyotsugu Sekioka

Proceedings of the 2012 Fifth International Conference on Emerging Trends in Engineering and Technology, 2012

Impact of Word Segmentation Errors on Automatic Chinese Text Classification.

Xi Luo, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 10th IAPR International Workshop on Document Analysis Systems, 2012

Multiple Feature-Classifier Combination in Automated Text Classification.

Lazaro S. P. Busagala, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 10th IAPR International Workshop on Document Analysis Systems, 2012

2011

Color Recognition by Extended Color Space Method for 64-color 2-D Barcode.

Takuma Shimizu, Mariko Isami, Kenji Terada, Wataru Ohyama, Fumitaka Kimura

Proceedings of the IAPR Conference on Machine Vision Applications (IAPR MVA 2011), 2011

Three Dimensional Rotation-Free Recognition of Characters.

Ryo Narita, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 2011 International Conference on Document Analysis and Recognition, 2011

A Study on Automatic Chinese Text Classification.

Xi Luo, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 2011 International Conference on Document Analysis and Recognition, 2011

An Impact of OCR Errors on Automated Classification of OCR Japanese Texts with Parts-of-Speech Analysis.

Akihiro Kokawa, Lazaro S. P. Busagala, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 2011 International Conference on Document Analysis and Recognition, 2011

2010

Improvement of On-line Signature Verification Based on Gradient Features.

Yumiko Kawazoe, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the International Conference on Frontiers in Handwriting Recognition, 2010

An impact of linguistic features on automated classification of OCR texts.

Gudila Paul Moshi, Lazaro S. P. Busagala, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Ninth IAPR International Workshop on Document Analysis Systems, 2010

2008

Improving Automatic Text Classification by Integrated Feature Analysis.

Lazaro S. P. Busagala, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

IEICE Trans. Inf. Syst., 2008

2007

Automatic Detection of Facial Midline as a Guide for Facial Feature Extraction.

Nozomi Nakao, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Pattern Recognition in Information Systems, 2007

Improvement of Cadastral Map Assembling Based on GHT.

Fei Liu, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the IAPR Conference on Machine Vision Applications (IAPR MVA 2007), 2007

Integrated Feature Analysis For Automatic Text Classification.

Lazaro S. P. Busagala, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Machine Learning and Data Mining in Pattern Recognition, 2007

2006

The Impact of OCR Accuracy and Feature Transformation on Automatic Text Classification.

Mayo Murata, Lazaro S. P. Busagala, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Document Analysis Systems VII, 7th International Workshop, 2006

Automatic Assembling of Cadastral Maps Based on Generalized Hough Transformation.

Fei Liu, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Document Analysis Systems VII, 7th International Workshop, 2006

2004

Eigenspace Method by Autoassociative Networks for Object Recognition.

Takamasa Yokoi, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Structural, 2004

A study on decision rule for Japanese dictation test.

Meng Shi, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Ninth International Workshop on Frontiers in Handwriting Recognition, 2004

Local slant estimation for handwritten English words.

Yimei Ding, Wataru Ohyama, Fumitaka Kimura, Malayappan Shridhar

Proceedings of the Ninth International Workshop on Frontiers in Handwriting Recognition, 2004

The Impact of OCR Accuracy on Automatic Text Classification.

Guowei Zu, Mayo Murata, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Content Computing, Advanced Workshop on Content Computing, 2004

Accuracy Improvement of Automatic Text Classification Based on Feature Transformation and Multi-classifier Combination.

Xuexian Han, Guowei Zu, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the Content Computing, Advanced Workshop on Content Computing, 2004

2003

Mirror Image Learning for Autoassociative Neural Networks.

Shusaku Shimizu, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 7th International Conference on Document Analysis and Recognition (ICDAR 2003), 2003

Accuracy improvement of automatic text classification based on feature transformation.

Guowei Zu, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 2003 ACM Symposium on Document Engineering, 2003

2002

Automatic Grading Prototype System for KANJI Dictation Test.

Meng Shi, Tetsushi Wakabayashi, Wataru Ohyama, Fumitaka Kimura

Proceedings of the 16th International Conference on Pattern Recognition, 2002

Comparative Study on Mirror Image Learning (MIL) and GLVQ.

Meng Shi, Tetsushi Wakabayashi, Wataru Ohyama, Fumitaka Kimura

Proceedings of the 16th International Conference on Pattern Recognition, 2002

Automatic Tracking of Local Myocardial Motion by Correlation Weighted Velocity Method.

Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura, Shinji Tsuruoka, Kiyotsugu Sekioka

Proceedings of the 16th International Conference on Pattern Recognition, 2002

A comparative study on mirror image learning and ALSM.

Tetsushi Wakabayashi, Meng Shi, Wataru Ohyama, Fumitaka Kimura

Proceedings of the Eighth International Workshop on Frontiers in Handwriting Recognition, 2002

2001

Mirror Image Learning for Handwritten Numeral Recognition.

Meng Shi, Tetsushi Wakabayashi, Wataru Ohyama, Fumitaka Kimura

Proceedings of the Machine Learning and Data Mining in Pattern Recognition, 2001

Accuracy Improvement of Handwritten Numeral Recognition by Mirror Image Learning.

Tetsushi Wakabayashi, Meng Shi, Wataru Ohyama, Fumitaka Kimura

Proceedings of the 6th International Conference on Document Analysis and Recognition (ICDAR 2001), 2001

Clustering with Projection Distance and Pseudo Bayes Discriminant Function for Handwritten Numeral Recognition.

Meng Shi, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the 6th International Conference on Document Analysis and Recognition (ICDAR 2001), 2001

2000

License Plate Recognition Using Associative Matching Based on Clique-Finding.

Meng Shi, Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura

Proceedings of the IAPR Conference on Machine Vision Applications (IAPR MVA 2000), 2000

Automatic Left Ventricular Endocardium Detection in Echocardiograms Based on Ternary Thresholding Method.

Wataru Ohyama, Tetsushi Wakabayashi, Fumitaka Kimura, Shinji Tsuruoka, Kiyotsugu Sekioka

Proceedings of the 15th International Conference on Pattern Recognition, 2000