M.E., Keio University

B.E., Keio University

Ph. D in Engineering, Keio University

Theory of informatics, Signal process. / Image process. / Multi dimension. signal process. / Signal process. for Image recognit. / App. to commun. process.

2017
Dept. Elec. And Comput. Eng., Faculty Eng., Shinshu Univ., Associate prof.

2006
Dept. Comput. Sci and Eng., Faculty Eng., Shinshu Univ., Assistant prof.

2003 - 2006, Keio University, Graduate School of Science and Engineering, Universal Design Engineering

2001 - 2003, Keio University, Graduate School of Science and Engineering, Universal Design Engineering

1997 - 2001, Keio University, Faculty of Science and Engineering, Electronics and Electrical Engineering

1996 - 1996, National Defense Academy of Japan, Faculty of Science and Engineering

Following papers are recent ones related to image processing. PDFs and code files are available on my home page. http://wwell.cs.shinshu-u.ac.jp/~keiichi/pub.html
2030

Discriminant analysis using Gabor filter sets for lobular endocervical glandular hyperplasia: numerical interpretation of nuclear atypia by Gabor filter features
Fumikazu Kimura, Kengo Ohshima, Keiichiro Shirai, Ryo Kanai, Masaki Sonohara, Keiko Ishii
ACTA CYTOLOGICA, 1-11, Jul. 2023, Refereed

Multimodal Analogy-Based Image Retrieval by Improving Semantic Embeddings
Kosuke Ota, Keiichiro Shirai, Hidetoshi Miyao, Minoru Maruyama
J. of Adv. Comput. Intelli. and Intelli. Informatics (JACIII), 26(6), 995-1005, Nov. 2022, Refereed

ISHIGAKI retrieval system using 3D shape matching and combinatorial optimization
Gou Koutaki, Sakino Ando, Keiichiro Shirai, Tsuyoshi Kishigami
Int. J. of Comput. Vis. (IJCV), Jul. 2022, Refereed

Adjoint bilateral filter and its application to optimization-based image processing
Keiichiro Shirai, Kenjiro Sugimoto, Sei-ichiro Kamata
APSIPA Trans. on Signal and Info. Process., 11(1), 1-27, Apr. 2022, Refereed
Lead, Corresponding

Pixel-wise parallel calculation for depth from focus with adaptive focus measure
Yoichi Matsubara, Keiichiro Shirai, Yuya Ito, Kiyoshi Tanaka
Int. J. Multidim. Systems Signal Process, 33, 121-142, Mar. 2022, Refereed
Corresponding

Guided facial skin color correction
Keiichiro Shirai, Tatsuya Baba, Shunsuke Ono, Masahiro Okuda, Yusuke Tatesumi, Paul Perrotin
MDPI signals, 2(3), 540-558, Aug. 2021, Refereed
Lead, Corresponding

Efficient Pixel-Wise SVD Required for Image Processing Using the Color Line Feature
Keiichiro Shirai, Yuya Ito, Hidetoshi Miyao, Minoru Maruyama
IEEE Access, 9, 79449-79460, 2021, Refereed
Lead, Corresponding

Reference-based local color distribution transformation method and its application to image integration
Ryo Matsuoka, Keiichiro Shirai, Masahiro Okuda
EURASIP Signal Process. Image Commun., 76, 231-242, Aug. 2019, Refereed

Hadamard coding for supervised discrete hashing
Gou Koutaki, Keiichiro Shirai, Mitsuru Ambai
IEEE Trans. on Image Process. (TIP), 27(11), 5378-5392, 2018, Refereed

All papers are listed on my homepage. http://wwell.cs.shinshu-u.ac.jp/~keiichi/pub_all.html
2030

Multiplexing Display using Vector Error Propagation and Smooth Active Shutter
Gou Koutaki, Keiichiro Shirai
ACM SIGGRAPH 2020 Emerging Technologies, 2020, ACM

ISHIGAKI Retrieval via Combinatorial Optimization
Sakino Ando, Gou Koutaki, Keiichiro Shirai
ACM Multimedia (ACMMM) Workshop on Structuring Understand. Multimedia heritAge Contents (SUMAC), 2019, ACM

A study on pixel-wise parallel calculation for depth from focus using gray level variance
Y. Matsubara, Y. Ito, K. Shirai, K. Tanaka
Int. Symp. Intelli Signal Process. Commun. Syst. (ISPACS) 401-405, 2018

Hadamard coded discrete cross modal hashing
K. Eto, G. Koutaki, K. Shirai
Int. Conf. on Image Process. (ICIP) 2007-2011, 2018, IEEE

Color affine subspace pursuit for color artifact removal
K. Yamanaka, S. Kyochi, S. Ono, K. Shirai
Int. Conf. on Acoust. Speech Signal Process. (ICASSP) 1358-1362, 2018, IEEE

(B) Fundamental experiment
Shinshu University

(B) Coding theory
Shinshu University

(M) Image process. and recognit.
Shinshu University

(M1) Practicum I on image signal process.
Shinshu University

(M2) Practicum II on image signal process.
Shinshu University

(M1) Experiment on image signal process.
Shinshu University

(B) Image process. (practicum)
Shinshu University

(B) Signal process.
Shinshu University

(D) Image process. and recognit.
Shinshu University

2006
IEEE, signal process. soc.

IEICE, SIP(signal process.), PRMU(pattern recognit. mach. understand.)

Image restoration

Color image processing

Colaborative research with other fields

Defect inspection by image recognition

Others
電子情報通信学会 (IEICE) 基礎境界ソサイエティ回路とシステム小特集, 2018

2023, 4, 2

2022, 5, 2

2021, 4, 4, 2, 1, 2, 1

2020, 4, 0, 2, 0, 0, 0, 0, 0, 0, 0

2019, 1, 中国 北京工業大 (China Beijing Univ. of Tech.)

2019, 1, 0, auditor (La Rochelle Univ.)

2018, 2, 中国 四川大 (China Sichuan Univ.), 中国 大連交通大 (China Dalian Jiaotong Univ.)

2018, 1, 0, auditor (La Rochelle Univ.)