Keiichiro Shirai

According to our database, Keiichiro Shirai authored at least 61 papers between 2008 and 2022.

Collaborative distances:

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

2022

Pixel-wise parallel calculation for depth from focus with adaptive focus measure.

Yoichi Matsubara, Keiichiro Shirai, Yuya Ito, Kiyoshi Tanaka

Multidimens. Syst. Signal Process., 2022

Multimodal Analogy-Based Image Retrieval by Improving Semantic Embeddings.

Kosuke Ota, Keiichiro Shirai, Hidetoshi Miyao, Minoru Maruyama

J. Adv. Comput. Intell. Intell. Informatics, 2022

ISHIGAKI Retrieval System Using 3D Shape Matching and Combinatorial Optimization.

Gou Koutaki, Sakino Ando, Keiichiro Shirai, Tsuyoshi Kishigami

Int. J. Comput. Vis., 2022

2021

Spatial Compression of Sensing Information for Exploiting the Vacant Frequency Resource Using Radio Sensors.

Kenichiro Yamamoto, Osamu Takyu, Keiichiro Shirai, Yasushi Fuwa

IEICE Trans. Commun., 2021

Optimal Construction of Access Rate to Superior Channel in Rendezvous Channel Based on Channel-Occupancy Ratio.

Yuki Nishio, Osamu Takyu, Hayato Soya, Keiichiro Shirai, Mai Ohta, Takeo Fujii

IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021

Guided Facial Skin Color Correction.

Keiichiro Shirai, Tatsuya Baba, Shunsuke Ono, Masahiro Okuda, Yusuke Tatesumi, Paul Perrotin

CoRR, 2021

Efficient Pixel-Wise SVD Required for Image Processing Using the Color Line Feature.

Keiichiro Shirai, Yuya Ito, Hidetoshi Miyao, Minoru Maruyama

IEEE Access, 2021

2020

Multiplexing Display using Vector Error Propagation and Smooth Active Shutter.

Gou Koutaki, Keiichiro Shirai

Proceedings of the SIGGRAPH 2020: Special Interest Group on Computer Graphics and Interactive Techniques Conference, 2020

2019

Reference-based local color distribution transformation method and its application to image integration.

Ryo Matsuoka, Keiichiro Shirai, Masahiro Okuda

Signal Process. Image Commun., 2019

ID Insertion and Data Tracking with Frequency Offset for Physical Wireless Parameter Conversion Sensor Networks.

Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii

Sensors, 2019

Adaptive Channel Assignment With Predictions of Sensor Results and Channel Occupancy Ratio in PhyC-SN.

Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta

IEEE Access, 2019

Adaptive Transmission Control with Prediction of Sensing Results for PhyC-SN.

Kyosuke Fukuda, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Sliiro Handa

Proceedings of the IEEE Radio and Wireless Symposium, 2019

ISHIGAKI Retrieval through Combinatorial Optimization.

Sakino Ando, Gou Koutaki, Keiichiro Shirai

Proceedings of the 1st Workshop on Structuring and Understanding of Multimedia heritAge Contents, 2019

Data Separation Considering Smoothness of Sensing Data in Physical Wireless Parameter Conversion Sensor Networks.

Shuhei Yamasaki, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa

Proceedings of the 33rd International Conference on Information Networking, 2019

2018

Hadamard Coding for Supervised Discrete Hashing.

Gou Koutaki, Keiichiro Shirai, Mitsuru Ambai

IEEE Trans. Image Process., 2018

Fast Rendezvous Scheme with a Few Control Signals for Multi-Channel Cognitive Radio.

Hayato Soya, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa

IEICE Trans. Commun., 2018

Transmit control and data separation in physical wireless parameter conversion sensor networks with event driven sensors.

Kyosuke Fukuda, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa

Proceedings of the IEEE Topical Conference on Wireless Sensors and Sensor Networks, 2018

A Study on Pixel-wise Parallel Calculation for Depth from Focus Using Gray Level Variance.

Yoichi Matsubara, Yuya Ito, Keiichiro Shirai, Kiyoshi Tanaka

Proceedings of the 2018 International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), 2018

Modified rendezvous scheme with inferring access channel probability of slave by master.

Hayato Soya, Osamu Takyu, Keiichiro Shirai, Fumihito Sasamori, Shiro Handa, Mai Ohta, Takeo Fujii

Proceedings of the 2018 International Conference on Information Networking, 2018

Hadamard Coded Discrete Cross Modal Hashing.

Koichi Eto, Gou Koutaki, Keiichiro Shirai

Proceedings of the 2018 IEEE International Conference on Image Processing, 2018

Color Affine Subspace Pursuit for Color Artifact Removal.

Kazuki Yamanaka, Seisuke Kyochi, Shunsuke Ono, Keiichiro Shirai

Proceedings of the 2018 IEEE International Conference on Acoustics, 2018

A Signal Separation Method for Physical Wireless Parameter Conversion Sensor Networks Using K-Shortest Path.

Shuhei Yamasaki, Minato Oriuchi, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

Data Separation Technique using Spatial Correlation of Sensing Results for Physical Wireless Parameter Conversion Sensor Networks.

Naoya Amano, Osamu Takyu, Keiichiro Shirai, Fumihito Sasamori, Shiro Handa

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2018

2017

Fast Singular Value Shrinkage With Chebyshev Polynomial Approximation Based on Signal Sparsity.

Masaki Onuki, Shunsuke Ono, Keiichiro Shirai, Yuichi Tanaka

IEEE Trans. Signal Process., 2017

Measurement Technique for Occupancy Ratio and Transition Ratio in Cognitive Radio System.

Hayato Soya, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa

Proceedings of the 2017 IEEE Wireless Communications and Networking Conference Workshops, 2017

Data Tracking Using Frequency Offset and SIC for Physical Wireless Conversion Sensor Networks.

Takehiro Sakai, Osamu Takyu, Keiichiro Shirai, Mai Ohta, Takeo Fujii, Fumihito Sasamori, Shiro Handa

Proceedings of the 2017 IEEE Wireless Communications and Networking Conference Workshops, 2017

Principal noiseless color component extraction by linear color composition with optimal coefficients.

Takuya Sugimoto, Kazuhiro Fujimori, Keiichiro Shirai, Hidetoshi Miyao, Minoru Maruyama

Proceedings of the 2017 IEEE International Conference on Image Processing, 2017

Interactive Image Search System Based on Multimodal Analogy.

Kosuke Ota, Keiichiro Shirai, Hidetoshi Miyao, Minoru Maruyama

Proceedings of the HCI International 2017 - Posters' Extended Abstracts, 2017

Frequency spectrum regularization for pattern noise removal based on image decomposition.

Keiichiro Shirai, Shunsuke Ono, Masahiro Okuda

Proceedings of the 25th European Signal Processing Conference, 2017

Hyperspectral image restoration based on spatio-spectral structure tensor regularization.

Ryuji Kurihara, Shunsuke Ono, Keiichiro Shirai, Masahiro Okuda

Proceedings of the 25th European Signal Processing Conference, 2017

2016

Local Spectral Component Decomposition for Multi-Channel Image Denoising.

Mia Rizkinia, Tatsuya Baba, Keiichiro Shirai, Masahiro Okuda

IEEE Trans. Image Process., 2016

Misaligned Image Integration With Local Linear Model.

Tatsuya Baba, Ryo Matsuoka, Keiichiro Shirai, Masahiro Okuda

IEEE Trans. Image Process., 2016

Fast Supervised Discrete Hashing and its Analysis.

Gou Koutaki, Keiichiro Shirai, Mitsuru Ambai

CoRR, 2016

Performance evaluation of multi-target tracking for PhyC-SN.

Minato Oriuchi, Osamu Takyu, Keiichiro Shirai, Fumihito Sasamori, Shiro Handa, Takeo Fujii, Mai Ohta

Proceedings of the IEEE Wireless Communications and Networking Conference Workshops, 2016

Multi-target tracking based on features of sensing results and wireless parameters for physical wireless parameter conversion sensor networks.

Minato Oriuchi, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa

Proceedings of the 2016 IEEE Radio and Wireless Symposium, 2016

Image colorization based on ADMM with fast singular value thresholding by Chebyshev polynomial approximation.

Masaki Onuki, Shunsuke Ono, Keiichiro Shirai, Yuichi Tanaka

Proceedings of the 2016 IEEE International Conference on Acoustics, 2016

Vectorial total variation based on arranged structure tensor for multichannel image restoration.

Shunsuke Ono, Keiichiro Shirai, Masahiro Okuda

Proceedings of the 2016 IEEE International Conference on Acoustics, 2016

Fundamental study of decomposition based on heterogeneous sensing data in physical conversion sensor networks.

Minato Oriuchi, Osamu Takyu, Keiichiro Shirai, Fumihito Sasamori, Shiro Handa, Mai Ohta, Takeo Fujii

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2016

2015

Data Tracking and Effect of Frequency Offset to Simultaneous Collecting Method for Wireless Sensor Networks.

Ryo Myoenzono, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Shiro Handa

Int. J. Distributed Sens. Networks, 2015

A regularization approach for bayer reconstruction in lossy image coding by inverse demosaicing.

Masao Yamagishi, Seisuke Kyochi, Keiichiro Shirai, Masahiro Okuda

Proceedings of the 2015 IEEE International Conference on Image Processing, 2015

Non-local/local image filters using fast eigenvalue filtering.

Masaki Onuki, Shunsuke Ono, Keiichiro Shirai, Yuichi Tanaka

Proceedings of the 2015 IEEE International Conference on Image Processing, 2015

Performance analysis of retargeting pyramid and its applications.

Ryosuke Morita, Keiichiro Shirai, Yuichi Tanaka

Proceedings of the 2015 IEEE International Conference on Image Processing, 2015

An automatic yearbook style photo generation method using color grading and guide image filtering based facial skin color correction.

Tatsuya Baba, Masahiro Okuda, Paul Perrotin, Yusuke Tatesumi, Keiichiro Shirai

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

2014

Data tracking and effect of frequency offset to simultaneous collecting method for wireless sensor networks.

Ryo Myoenzono, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Sliiro Handa

Proceedings of the International Conference on Information and Communication Technology Convergence, 2014

Color transform between image pair using covariance correspondences of local color distributions.

Yusuke Tatesumi, Keisuke Iwata, Keiichiro Shirai, Masahiro Okuda

Proceedings of the IEEE International Conference on Acoustics, 2014

FFT based solution for multivariable L2 equations using KKT system via FFT and efficient pixel-wise inverse calculation.

Keiichiro Shirai, Masahiro Okuda

Proceedings of the IEEE International Conference on Acoustics, 2014

Retargeting pyramid using direct decimation.

Ryosuke Morita, Keiichiro Shirai, Yuichi Tanaka

Proceedings of the IEEE International Conference on Acoustics, 2014

Lossless/near-lossless color image coding by inverse demosaicing.

Ryo Kuroiwa, Ryo Matsuoka, Seisuke Kyochi, Keiichiro Shirai, Masahiro Okuda

Proceedings of the IEEE International Conference on Acoustics, 2014

Flash/no-flash image integration using convex optimization.

Tatsuya Baba, Ryo Matsuoka, Shunsuke Ono, Keiichiro Shirai, Masahiro Okuda

Proceedings of the IEEE International Conference on Acoustics, 2014

O(1) transposed bilateral filtering for optimization.

Kenjiro Sugimoto, Keiichiro Shirai, Sei-ichiro Kamata

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2014

2013

An OCR System with OCRopus for Scientific Documents Containing Mathematical Formulas.

Fumihiro Furukori, Shinpei Yamazaki, T. Miyagishi, Keiichiro Shirai, Masayuki Okamoto

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

Scalable image representation using improved retargeting pyramid.

Yuichi Tanaka, Keiichiro Shirai

Proceedings of the IEEE International Conference on Acoustics, 2013

High dynamic range image acquisition using flash image.

Ryo Matsuoka, Tatsuya Baba, Masahiro Okuda, Keiichiro Shirai

Proceedings of the IEEE International Conference on Acoustics, 2013

2012

Color-line vector field and local color component decomposition for smoothing and denoising of color images.

Keiichiro Shirai, Masahiro Okuda, Masaaki Ikehara

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

Removal of Background Patterns and Signatures for Magnetic Ink Character Recognition of Checks.

Keiichiro Shirai, Masashi Akita, Masayuki Okamoto, Kazuya Tanikawa, Takaaki Akiyama, Tetsuji Sakaguchi

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

Directional image decomposition using retargeting pyramid.

Yuichi Tanaka, Keiichiro Shirai

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2012

Flicker and black-streak artifact removal from images of display monitors taken by video cameras.

Kotaro Nakazawa, Keiichiro Shirai, Masayuki Okamoto, Toshio Koga

Proceedings of the Asia-Pacific Signal and Information Processing Association Annual Summit and Conference, 2012

Local Covariance Filtering for Color Images.

Keiichiro Shirai, Masahiro Okuda, Takao Jinno, Masayuki Okamoto, Masaaki Ikehara

Proceedings of the Computer Vision, 2012

2011

Noiseless no-flash photo creation by color transform of flash image.

Keiichiro Shirai, Masayuki Okamoto, Masaaki Ikehara

Proceedings of the 18th IEEE International Conference on Image Processing, 2011

Embedding a Mathematical OCR Module into OCRopus.

Shinpei Yamazaki, Fumihiro Furukori, Qinzheng Zhao, Keiichiro Shirai, Masayuki Okamoto

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

2008

A Study for High Performance Character Extraction from Color Scene Images.

Keiichiro Shirai, Masanori Wakabayashi, Masayuki Okamoto, Hiroaki Yamamoto

Proceedings of the Eighth IAPR International Workshop on Document Analysis Systems, 2008