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Hiromasa Oku, Professor

Faculty of Informatics,

School of Science and Technology

Gunma University

 

1-5-1, Tenjin-cho, Kiryu, Gunma 376-8515, Japan

(Kiryu Campus, Building 2nd, 305-2)

E-mail: h.oku <at> gunma-u.ac.jp

Phone: +81-277-30-1940

Research Topics

Oku is interested in Dynamic Image Control (DIC). The purpose of the DIC is to provide adequate visual information to human in comprehensible and intelligible way by the control of optics, illuminations, and signal processing. He researches on basic theory and device development, and also wide applications, such as bio-technology, microscope, visual media, and factory automations.

Publications

Paper

  • Masumi Mitobe, Hiromasa Oku, Ren Kamata, Keita Yasutomi, Shoji Kawahito: Random Access Vision: A New Imaging Method to Observe Arbitrary and Multiple Gaze Directions in Frame-By-Frame Manner, Optics Express, vol.32, 21708-21723 (2024) [doi:10.1364/OE.523537]

  • Yutong Gu, Hiromasa Oku, Masahiro Todoh: American Sign Language Recognition and Translation Using Perception Neuron Wearable Inertial Motion Capture System, Sensors, Vol.24, No.2, 453 (2024) [doi:10.3390/s24020453]

  • Hiroyuki Ogihara, Yuki Funato, Hiromasa Oku: Proposal for a Distraction Technique Using Two-Screen Projection for Stress Relief in Children with Medical Complexity, IEEE Access, Vol.11, pp.105749-105760 (2023) [doi:10.1109/ACCESS.2023.3316226​]

  • Eric Fujiwara, Lidia O. Rosa, Hiromasa Oku, Cristiano M. B. Cordeiro:  Agar-based optical sensors for electric current measurements, Scientific Reports, Vol.13, 13517 (2023) [doi:10.1038/s41598-023-40749-7]

  • Hiromu Kijima, Hiromasa Oku: Structured Light Field by Two Projectors Placed in Parallel for High-speed and Precise 3D Feedback, Journal of Robotics and Mechatronics, Vol.34, No.5, pp. 1096-1110 (2022) [doi:10.20965/jrm.2022.p1096]

  • Kazuki Yamato, Masatoshi Iuchi, and Hiromasa Oku: High-speed and Low-latency 3D Fluorescence Imaging for Robotic Microscope, Journal of Robotics and Mechatronics, Vol.34, No.5, pp. 1164-1174 (2022) [doi:10.20965/jrm.2022.p1164]

  • Hiromasa Oku, Miko Sato, and Yuki Funato: Edible Retoreflector Made of Candy, IEEE Access, Vol.10, pp.24749-24758 (2022) [doi:10.1109/ACCESS.2022.3155603​]

  • Kazuki Arai, Hiromasa Oku : High speed light sheet microscope with millisecond control of focus and sheet light, Journal of the Robotics Society of Japan (2022) (in Japanese, to appear)

  • Shino Higuchi, Hiromasa Oku : Wide angular range dynamic projection mapping method applied to drone-based avatar robot (short paper), Advanced Robotics, Vol.35, Issue 11, pp.675-684 (2021) [doi:10.1080/01691864.2021.1928550]

  • Kohei Suzuki, Yugo Fukano, and Hiromasa Oku : 1000-volume/s high-speed volumetric display for high-speed HMD, Optics Express, Vol. 28, Issue 20, pp. 29455-29468 (2020) [doi:10.1364/OE.401778​]

  • Kazuki Yamato, Yusuke Tanaka, Hiromasa Oku, Keita Yasutomi, and Shoji Kawahito : Quasi-simultaneous Multi-focus Imaging Using Lock-in Pixel Image Sensor and TAG Lens, Optics Express, Vol. 28, Issue 13, pp. 19152-19162 (2020) [doi:10.1364/OE.394760]

  • Eric Fujiwara, Thiago D. Cabral, Miko Sato, Hiromasa Oku, Cristiano M. B. Cordeiro : Agarose-based structured optical fibre, Scientific Reports, Vol.10, 7035 (2020) [doi:10.1038/s41598-020-64103-3​]

  • Kazuki Yamato, Hiroyuki Chiba, Hiromasa Oku : High Speed Three Dimensional Tracking of Swimming Cell by Synchronous Modulation between TeCE Camera and TAG Lens, IEEE Robotics and Automation Letters, Vol.5, No.2, pp. 1907-1914, April 2020. [doi:10.1109/LRA.2020.2969911]

  • Tomoaki Mashimo, Shunsuke Iduhara, Zhong Zhang, Hiromasa Oku : High-speed Visual Feedback Control of Miniature Rotating Mirror System using a Micro Ultrasonic Motor, IEEE Access, Vol.8, pp. 38546-38553 (2020)  (First Online: 03 December 2019)  [doi:10.1109/ACCESS.2019.2957298​]

  • Miyu Nomura, Hiromasa Oku : Edible lens made of agar, Optical Review (2019) [doi:10.1007/s10043-019-00557-9]

  • Kazuki Yamato, Toshihiko Yamashita, Hiroyuki Chiba and Hiromasa Oku : Fast Volumetric Feedback under Microscope by Temporally Coded Exposure Camera, Sensors, Vol.19, No.7, 1606 (2019) [doi:10.3390/s19071606]

  • Hiromasa Oku, Takahiro Uji, Yiting Zhang, Kumi Shibahara : Edible fiducial marker made of edible retroreflector, Computers & Graphics, Vol.77, pp.156-165 (2018) [doi:10.1016/j.cag.2018.10.002]

  • Kazuki Yamato, Hiroyuki Chiba, Toshihiko Yamashita, Hiromasa Oku : 1 ms 3D Feedback Microscope with 69 kHz Synchronous Modulation of Focal Position and Illumination, IEEE Robotics and Automation Letters, Vol.3, Issue 3, pp.1978-1984 (2018) [doi:10.1109/LRA.2018.2792151]

  • Takahiro Uji, Yiting Zhang, and Hiromasa Oku : Proposal of Edible Retroreflector and Its Prototype, Transactions of the Virtual Reality Society of Japan, Vol.22, No.4, pp.535-543 (2017) [doi:10.18974/tvrsj.22.4_535] (in Japanese)

  • Lihui Wang, Hiromasa Oku, and Masatoshi Ishikawa : Paraxial ray solution for liquid-filled variable focus lenses, Japanese Journal of Applied Physics, Vol.56, 122501 (2017) [doi:10.7567/JJAP.56.122501]

  • Tomohiro Sueishi, Hiromasa Oku and Masatoshi Ishikawa : Lumipen 2: Dynamic Projection Mapping with Mirror-Based Robust High-Speed Tracking against Illumination Changes, Presence Teleoperators & Virtual Environments, Vol.25, Issue 4, pp.299-321 (2017) [doi:10.1162/PRES_a_00275]

  • Tomohiro Sueishi, Hiromasa Oku and Masatoshi Ishikawa : High-precision Calibration Method for Three-dimensional Measurement of a Mirror-based High-speed Optical Axis Controller, The Journal of The Institute of Image Information and Television Engineers, Vol.71, No.5, pp.J162-J171 (2017) (in Japanese)

  • Akihiro Obara, Xu Yang, and Hiromasa Oku : Structured Light Field Generated by Two Projectors for High-Speed Three Dimensional Measurement, Journal of Robotics and Mechatronics, Vol.28, No.4, pp.523-532 (2016) [doi:10.20965/jrm.2016.p0523 ]

  • Koseki Kobayashi-Kirschvink, Hiromasa Oku  : Design Principles of a High-speed Omni-Scannable Gaze Controller, IEEE Robotics and Automation Letters, Vol.1, Issue 2, pp.836-843 (2016) [doi:10.1109/LRA.2016.2524981]

  • Takuya Matsumoto, Hiromasa Oku and Masatoshi Ishikawa : High-Speed Real-Time Depth Estimation by Projecting Structured Light Field, Journal of Robotics Society of Japan, Vol.34, No.1, pp.48-55 (2016) (in Japanese)

  • Kohei Okumura, Keiko Yokoyama, Hiromasa Oku and Masatoshi Ishikawa : 1ms Auto Pan-Tilt - video shooting technology for objects in motion based on Saccade Mirror with background subtraction, Advanced Robotics, Vol.29, No.7, pp.457-468 (2015) [doi:10.1080/01691864.2015.1011299]

  • Yuichiro Nakai, Mitsunori Ozeki, Takumi Hiraiwa, Ryuichi Tanimoto, Akira Funahashi, Noriko Hiroi, Atsushi Taniguchi, Shigenori Nonaka, Viviane Boilot, Roshan Shrestha, Joanna Clark, Naoka Tamura, Viji M. Draviam and Hiromasa Oku : High-speed microscopy with an electrically tunable lens to image the dynamics of in vivo molecular complexes, Review of Scientific Instruments, Vol.86, 013707 (2015) [doi:10.1063/1.4905330]

  • Lihui Wang, Hiromasa Oku, and Masatoshi Ishikawa : An improved low-optical-power variable focus lens with a large aperture, Optics Express, Vol.22, Iss.16, pp. 19448-19456 (2014) [doi:10.1364/OE.22.019448]

    • also included in, The Virtual Journal for Biomedical Optics, Vol.9, Iss.10 (2014)

  • Tomohiro Sueishi, Keisuke Hasegawa, Kohei Okumura, Hiromasa Oku, Hiroyuki Shinoda and Masatoshi Ishikawa : High-speed Dynamic Information Environment with Airborne Ultrasound Tactile Display-Camera System and The Calibration Method, Transactions of the Virtual Reality Society of Japan, Vol.19, No.2, pp.173-183 (2014) (in Japanese)

  • Leo Miyashita, Yuko Zou, Kohei Okumura, Hiromasa Oku, Masatoshi Ishikawa : Non-contact Vibration Measurement System for Dynamic Objects by Using High-speed Optical Axis Control, Transactions of the Virtual Reality Society of Japan, Vol.19, No.2, pp.99-104 (2014) (in Japanese)

  • Taku Senoo, Yuji Yamakawa, Yoshihiro Watanabe, Hiromasa Oku and Masatoshi Ishikawa : High-Speed Vision and its Application Systems, Journal of Robotics and Mechatronics, Vol.26, No.3, pp.287-301 (2014)

  • Yusuke Arai, Ken-ichi Wakabayashi, Masahide Kikkawa, Hiromasa Oku, Masatoshi Ishikawa : Three-Dimensional Tracking of Chlamydomonas in Dark Field Microscopy, Journal of the Robotics Society of Japan, Vol.31, No.10, pp.1028-1035 (2013)  (in Japanese)

  • Kohei Okumura, Masato Ishii, Eri Tatsumi, Hiromasa Oku and Masatoshi Ishikawa : Image Measurement of a High-speed Flying Object using the High-speed Gaze Controller, Transactions of the Society of Instrument and Control Engineers (SICE), Vol.49, No.9, pp.855-864 (2013) (in Japanese)

  • Tomohiro Sueishi, Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : Stereo Measurement System for High-speed Motion and Deformation of Objects Using Two Gaze Controllers by Rotational Mirrors, Transactions of the Virtual Reality Society of Japan, Vol.18, No.2, pp.181-190 (2013) (in Japanese)

  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : Projection-based AR for Dynamic Objects by Using High-speed Optical Axis Control, Journal of the Institute of Image Information and Television Engineers, Vol.67, No.7, pp.J204-J211 (2013) [doi:10.3169/itej.67.J204]  (in Japanese)

  • Wang Lihui, Hiromasa Oku, and Masatoshi Ishikawa : Variable-focus lens with 30 mm optical aperture based on liquid-membrane-liquid structure, Applied Physics Letters, Vol.102, 131111 (2013) [doi:10.1063/1.4800603] [PDF] *AIP

  • Hiromasa Oku, Soshiro Makise, Masatoshi Ishikawa : High-Speed Autofocusing of Cells Using Radial Intensity Profiles Based on Depth From Diffraction (DFDi) Method, Journal of Aero Aqua Bio-mechanisms, Vol.3, No.1, pp.13-21 (2013) [doi:10.5226/jabmech.3.13]

  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : Optical Gaze Control System to Realize More High-speed Active Vision, Journal of the Robotics Society of Japan, Vol.29, No.2, pp.201-211 (2011) (in Japanese)

  • Hiromasa Oku, Takahiko Ishikawa and Masatoshi Ishikawa : High-Speed Focusing Vision: Coupling of Image Processing System with Tunable Optics without Speed Bottleneck, Journal of the Robotics Society of Japan, Vol.27, No.7, pp.739-748 (2009) (in Japanese)

  • Hiromasa Oku and Masatoshi Ishikawa : High-speed liquid lens with 2 ms response and 80.3 nm root-mean-square wavefront error, Applied Physics Letters, Vol.94, 221108 (2009) [doi:10.1063/1.3143624] [PDF] *AIP

  • Naoko Ogawa, Kyohei Kikuta, Hiromasa Oku, Takeshi Hasegawa, Alvaro Cassinelli and Masatoshi Ishikawa : Proposal for Real-World-Oriented Interaction System with Microorganisms and Its Preliminary Study, IPSJ Journal, Vol.49, No.10, pp.3546-3552 (2008) (in Japanese)

  • Takeshi Hasegawa, Naoko Ogawa, Hiromasa Oku and Masatoshi Ishikawa : A New Framework for Microrobotic Control of Motile Cells based on High-Speed 3-D Tracking and Galvanotaxis Control, Journal of the Robotics Society of Japan, Vol.26, No.6, pp.575-582 (2008) (in Japanese) 

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto and Masatoshi Ishikawa : Trajectory Planning of Motile Cell for Microrobotic Applications, Journal of Robotics and Mechatronics, Vol.19, No.2, pp.190-197 (2007)

  • Hiromasa Oku, Masatoshi Ishikawa, Theodorus, and Koichi Hashimoto : High-speed autofocusing of a cell using diffraction pattern, Optics Express, Vol.14, pp.3952-3960 (2006) [doi:10.1364/OE.14.003952] 

    • also included in, The Virtual Journal for Biomedical Optics, Vol.1, Iss.6 (2006)

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : A physical model for galvanotaxis of Paramecium cell, Journal of Theoretical Biology, Vol.242, Iss. 2, pp.314-328 (2006) [doi:10.1016/j.jtbi.2006.02.021] [PDF] *Elsevier

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Microrobotic Visual Control of Motile Cells using High-Speed Tracking System, IEEE Transactions on Robotics, Vol.21, No.4, pp.704-712 (2005) [PDF] *IEEE

  • Hiromasa Oku, Naoko Ogawa, Koichi Hashimoto, and Masatoshi Ishikawa : Two-dimensional tracking of a motile microorganism allowing high-resolution observation with various imaging techniques, Review of Scientific Instruments, Vol.76, No.3, 034301 (2005) [doi:10.1063/1.1857632] [PDF] *AIP

    • also included in, Virtual Journal of Biological Physics Research, Vol.9, Iss.4 (2005)

  • Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Variable-focus lens with 1-kHz bandwidth, Optics Express, Vol.12, No.10, pp.2138-2149 (2004) [doi:10.1364/OPEX.12.002138] 

  • Hiromasa Oku and Masatoshi Ishikawa : Structure of Dynamic Focusing Lens with kHz Order Response for High-Speed Vision System, Japanese Journal of Optics, Vol.31, No.10, pp.758-764 (2002) (in Japanese)

  • Hiromasa Oku, Idaku Ishii, and Masatoshi Ishikawa : A microscopic visual feedback system, Systems and Computers in Japan, Vol.35, No.13, pp.71-79 (2004) ([Translated from] The Transactions of the Institute of Electronics Information and Communication Engineers D-II, Vol.J84-D-II, No.6, pp.994-1002 (2001) )

2010 - present

2010 - present

Book

  • Masatoshi Ishikawa, Idaku Ishii, Yutaka Sakaguchi, Makoto Shimojo, Hiroyuki Shinoda, Hirotsugu Yamamoto, Takashi Komuro, Hiromasa Oku, Yutaka Nakajima, Yoshihiro Watanabe : Dynamic Information Space Based on High-Speed Sensor Technology, Human-Harmonized Information Technology --- Vertical Impact --- (Toyoaki Nishida Ed.), Vol.1, Springer, pp.97-136 (2016) , ISBN: 978-4-431-55865-1 (Print) 978-4-431-55867-5 (Online)[doi:10.1007/978-4-431-55867-5_5]

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Dynamics Modeling and Real-time Observation of Galvanotaxis in Paramecium caudatum, Bio-mechanisms of Swimming and Flying --- Fluid Dynamics, Biomimetic Robots, and Sports Science --- (N. Kato and S. Kamimura Eds.), Springer, pp.29-40 (2008) (ISBN 978-4431733799)

Review paper / Article

  • Eric Fujiwara, Hiromasa Oku, Cristiano M. B. Cordeiro : Recent developments in agar-based optical devices (Prospective), MRS Communications (2024) [doi:10.1557/s43579-024-00558-z]

  • Hiromasa Oku and Kazuhisa Iida : Automatic omni-directional, high-speed, pan-tilt platform, SPIE Newsroom (Technical Article) (2017.02.23) [doi:10.1117/2.1201611.006748]

  • Yoshihiro Watanabe, Hiromasa Oku, Masatoshi Ishikawa : Architectures and applications of high-speed vision, Optical Review, Vol.21, Iss.6, pp. 875-882 (2014) [doi:10.1007/s10043-014-0140-8]

  • Hiromasa Oku and Masatoshi Ishikawa : A rapidly deformable liquid lens, SPIE Newsroom (Technical Article) (2009.12.14) [doi:10.1117/2.1200912.002505]

Invited talk

  • Eric Fujiwara, Hiromasa Oku, Cristiano Cordeiro: Soft Optical Fibers Made of Agar, 2023 MRS Fall Meeting & Exhibit (Online/Boston, USA, 2023.12.05) EL05.10.02

  • Hiromasa Oku: Aerial display technology based on dynamic projection mapping and flying screens (Invited Paper), SPIE OPTICS+PHOTONICS, Industrial Optical Devices and Systems (ODS 2023) (San Diego Convention Center, San Diego, USA, 2023.08.21) / 12684-18

  • Hiromasa Oku:  Aerial display based on high-speed visual servoing using dynamic optical components (Invited), The 6th International Conference on Intelligent Robotics and Control Engineering (IRCE 2023) (Jinlin, China, 2023.08.05) Invited Session 2: Active Vision and Interaction

  • Hiromasa Oku : Simultaneous imaging of arbitrary focus and gaze-direction based on nanoseconds exposure timing control (Keynote), 3rd International Conference on Computational Imaging (CITA2023) (University of Technology Sydney, Sydney, Australia, 2023.06.03)

  • Hiromasa Oku, Masatoshi Iuchi : Aerial Displays Based on Dynamic Projection Mapping on Drones (Invited), The 29th International Display Workshops (IDW'22) (Online/Fukuoka International Congress Center, Fukuoka, Japan, 2022.12.16), PRJ7-1

  • Hiromasa Oku : Dynamic Displays based on High-Speed Optical Components (invited), The 22nd International Meeting on Information Display (iMiD 2022), (Online/BEXCO, Busan, Korea, 2022.08.25), E37-1

  • Hiromasa Oku : Arbitrary and multiple focusing based on TAG lens and nanoseconds timing control, OSK-OSA-OSJ Joint Symposia on Optics, Optics and Photonics Congress 2021 (Online/ICC Jeju Korea, 2021.07.07), W2B-XI-.02

  • Hiromasa Oku, Kazuki Yamato, Keita Yasutomi, Shoji Kawahito : AIS1/PRJ1-3L Arbitrary Focusing based on Nano-Second Multi-Exposure and TAG Lens (invited), The 27th International Display Workshops (IDW'20) (Virtual Conference, 2020.12.9) / Proc. International Display Workshops, Vol.27, pp.969-972 (2020)

  • Hiromasa Oku : Edible Retroreflector for Dynamic Projection Mapping on Foods (invited), Laser Display and Lighting Conference (LDC2018), OPTICS & PHOTONICS International Congress 2018 (Pacifico Yokohama, Kanagawa, 2018.4.24)/Session No. LDC4-1

  • Hiromasa Oku : Dynamic Imaging Technologies Using High-speed Optical Components(invited), International Symposium on Imaging, Sensing, and Optical Memory 2017 (ISOM'17) (Kunibiki Messe, Shimane, 2017.10.23) / Technical Digest, Mo-B-01

  • Hiromasa Oku : Fundamental study on ultra high-speed 3D biological imaging using a tunable acoustic gradient (TAG) index device, International Workshop on Quantitative Biology 2017, Session IV-2 (Keio University, Yagami Campus, Kanagawa, 2017.4.15)

  • Hiromasa Oku : Dynamic Image Control based on High-Speed Optical Devices and its Applications in Sports Science, Japan Table Tennis Association Sports Science and Medicine Committee International Meeting 2016, Special Program (Ajinomoto National Training Center, Tokyo, 2016.9.24)

  • Hiromasa Oku : Dynamic Image Control based on High-speed Optical Component, Taoyaka Program Seminar (Hiroshima University, Hiroshima, Japan, 2015.6.1)

  • Hiromasa Oku : Dynamic image control based on high-speed optical devices (Invited), The 5th International Symposim on Photoelectronic Detection and Imaging (ISPDI2013) (Beijing, China, 2013.6.26) / Invited Talks, p. 59

  • Hiromasa Oku : Dynamic imaging based on high-speed optical components (Keynote Lecture), The 5th International Symposium on Aero Aqua Bio-Mechanisms (ISABMEC 2012)(Taipei, Taiwan, 2012.8.26) / Proceedings, pp.13-18

Conference

  • Hiroyuki Ogihara, Erika Okada, Hiromasa Oku: Proposal for Distraction in Pediatric Nursing Using Two-Screen Projection Method to Support Children Receiving Medical Care and Their Families, IEEE International Conference on Robotics and Automations (IEEE ICRA 2024) Workshop on Nursing Robotics (PACIFICO Yokohama, Kanagawa, 2024.5.17)/paper number 7

  • Yuito Hirohashi and Hiromasa Oku: Aerial Display Method Using a Flying Screen with an IR Marker and Long Range Dynamic Projection Mapping,  SIGGRAPH Asia 2023 Posters (SA '23) (International Convention Centre (ICC), Sydney, Australia, 2023.12.13-15),  Article 2, 1–2. [doi:10.1145/3610542.3626123] 

  • ​Eric Fujiwara, Cristiano Cordeiro, Hiromasa Oku, Carlos Suzuki: Sensing with agar-based optical waveguides, SPIE Future Sensing Technologies (SPIE FST 2023) (Pacifico Yokohama National Convention Hall, Yokohama, Kanagawa, 2023.4.19) / 12327-31

  • Masatoshi Iuchi, Yuito Hirohashi, Hiromasa Oku: Proposal for an aerial display using dynamic projection mapping on a distant flying screen (Conference Paper, Acceptance rate ~21%), the 30th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR 2023) (Online/Pudong Shangri-La Hotel, Shanghai, China, 2023.3.28) / Proc. IEEE VR 2023, pp. 603-608

  • Yuki Funato, Suzuno Hayashi, Hiromasa Oku: Edible Light Pipe Made of Candy (Poster), the 30th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR 2023) (Online/Pudong Shangri-La Hotel, Shanghai, China, 2023.3.29) / Proc. IEEE VR 2023, pp. 859-860

  • Kazuki Arai, Hiromasa Oku: A 100 volume/s light-sheet microscope applied to 3D motion measurement of freely swimming cells, OPTICA Imaging and Applied Optics Congress 2022 (Hyatt Regency Vancouver, Vancouver, Canada or online, 2022.7.15) / 3F3A.5

  • Shino Higuchi and Hiromasa Oku: Wide Angular Range Dynamic Projection Mapping Method Applied to the Projection on a Flying Drone, ACM SIGGRAPH 2021 Posters (SIGGRAPH '21) (Virtual Conference, 2021.8.9-13) / Article 22, 1-2. [doi:10.1145/3450618.3469137​]

  • Chanrathnak Borann, Masaki Yamashita, Hiromasa Oku : Improving CNN-based Tracking Method for Visual Feedback System to Perform Online Tracking at 300fps, Optics & Photonics International Congress 2021 (OPIC 2021) (Online, 2021.4.21) / Proc. OPIC 2021, IoT-SNAP-4-03

  • Hiromasa Oku, Kazuki Yamato, Yusuke Tanaka, Keita Yasutomi, and Shoji Kawahito, Simulfocus imaging: quasi-simultaneous multi-focus imaging using Lock-in Pixel imager and TAG lens, Proc. ACM SIGGRAPH 2020 Emerging Technologies (SIGGRAPH '20) (Virtual Conference, 2020.8.28) / Article 18, 1–2. https://doi.org/10.1145/3388534.3407298​

  • Kohei Suzuki, Yugo Fukano, Hiromasa Oku : Vergence-accommodation conflict free near eye volumetric display principle with high-speed display rate of 1000 volumes/s, OSA Imaging and Applied Optics Congress (Virtual Conference, 2020.6.26) DF2A.1

  • Kazuki Yamato, Hiroyuki Chiba, Hiromasa Oku : High Speed Three Dimensional Tracking of Swimming Cell by Synchronous Modulation between TeCE Camera and TAG Lens, IEEE Robotics and Automation Letters (RA-L) paper (Vol.5, No.2, pp. 1907-1914, April 2020) presented at the 2020 IEEE International Conference on Robotics and Automation (ICRA 2020) (Virtual Conference, 2020.6.3) WeD16

  • Hiromasa Oku : Edible optics and its potential applications, 2nd Workshop on The Future of Computing & Food (Koshinkan KS209, Kinugasa Campus, Ritsumeikan University, Kyoto, Japan, 2019.3.28) / in Inspiration Talks.

  • Miyu Nomura, Hiromasa Oku : Edible lens made of agar, the 26th IEEE International Conference on Virtual Reality and 3D User Interfaces (IEEE VR 2019) (Osaka International Convention Center, Osaka, 2019.3.27) / Poster #153

  • Miko Sato, Yuki Funato, Hiromasa Oku : Edible Retroreflector Made of Candy, the 26th IEEE International Conference on Virtual Reality and 3D User Interfaces (IEEE VR 2019) (Osaka International Convention Center, Osaka, 2019.3.26) / Poster #101

  • Kazuki Yamato, Toshihiko Yamashita, Hiroyuki Chiba, Hiromasa Oku : Temporally Coded Exposure Camera for High-Speed Feedback of Microscopic 3D Information, 2018 IEEE International Conference on Robotics and Biomimetics (ROBIO 2018) (Kuala Lumpur Convention Centre, Kuala Lumpur, Malaysia, 2018.12.14) / Proceedings, pp.958-963

  • Hiromasa Oku, Miyu Nomura, Kumi Shibahara, Akihiro Obara : Edible Projection Mapping, In Proceedings of Siggraph Asia’18 (SA'18) Emerging Technologies. (Tokyo International Forum, Tokyo, 2018.12.5-7) ACM, New York, NY, USA, 2 pages. https://doi.org/10.1145/3275476.3275486

  • Toshihiko Yamashita, Hiroyuki Chiba, Kazuki Yamato, Hiromasa Oku : Development of a coded exposure camera for high-speed 3D measurememt using microscope, OSA Imaging and Applied Optics Congress (Wyndham Orlando Resort International Drive, Orlando, USA, 2018.06.26)/ITu3B.2

  • Kazuki Yamato, Hiroyuki Chiba, Toshihiko Yamashita, Hiromasa Oku : 1 ms 3D Feedback Microscope with 69 kHz Synchronous Modulation of Focal Position and Illumination, IEEE Robotics and Automation Letters (RA-L) paper (Vol.3, Issue 3, pp.1978-1984, 2018) presented at the 2018 IEEE International Conference on Robotics and Automation (ICRA 2018) (Brisbane Convention & Exhibition Centre, Brisbane, Australia, 2018.5.23)

  • Takahiro Uji, Yiting Zhang, and Hiromasa Oku : Edible Retroreflector (Full Paper), 23rd ACM Symposium on Virtual Reality Software and Technology (VRST ’17) (Lindholmen Conference Centre, Gothenburg, Sweden, 2017.11.08) / Proceedings [doi:10.1145/3139131.3139148] (acceptance rate 21%)  (Best Paper Award)

  • Yukimi Tateno, Masato Ishii, Hiromasa Oku : High resolution imaging of a subsonic projectile using automated mirrors with large aperture, The 31st International Congress on High-speed Imaging and Photonics (31st ICHSIP) (Hotel Hankyu Expo Park, Osaka, Japan, 2016.11.10) / Proceedings, pp. 734-737

    • Y. Tateno ; M. Ishii and H. Oku : High resolution imaging of a subsonic projectile using automated mirrors with large aperture, Proc. SPIE 10328, Selected Papers from the 31st International Congress on High-Speed Imaging and Photonics, 103280W (February 20, 2017) [doi:10.1117/12.2269907]

  • Koseki Kobayashi-Kirschvink, Hiromasa Oku : Design Principles of a High-speed Omni-scannable Gaze Controller, IEEE Robotics and Automation Letters (RA-L) paper (Vol.1, Issue 2, pp.836-843, 2016) presented at the 2016 IEEE International Conference on Robotics and Automation (ICRA 2016) (Stockholm Waterfront Congress Centre, Stockholm, Sweden, 2016.5.18)

  • Kazuhisa Iida and Hiromasa Oku : Saccade Mirror 3: High-speed gaze controller with ultra wide gaze control range using triple rotational mirrors, 2016 IEEE International Conference on Robotics and Automation (ICRA 2016) (Stockholm Waterfront Congress Centre, Stockholm, Sweden, 2016.5.17) / Proceedings, pp.624-629

  • Yuichiro Nakai, Atushi Taniguchi, Shigenori Nonaka, Viji M. Draviam, Hiromasa Oku, Noriko Hiroi, Akira Funahashi : Development of 3D single particle tracking system with an electrically tunable lens, NIG International Symposium 2016 Japan Q-Bio week, Tokyo Symposium (Institute of Industrial Science, the University of Tokyo, Tokyo, 2016.1.9-10) / poster number, 16

  • Tomohiro Sueishi, Hiromasa Oku and Masatoshi Ishikawa : Mirror-based High-speed Gaze Controller Calibration with Optics and Illumination Control, 2015 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2015) (Congress Center Hamburg, Hamburg, Germany, 2015.9.30) / Proceedings, pp.3064-3070

  • Tomohiro Sueishi, Hiromasa Oku, Masatoshi Ishikawa : Robust High-speed Tracking against Illumination Changes for Dynamic Projection Mapping, IEEE Virtual Reality Conference (VR2015) (Arles Congress Center, Arles, France, 2015.3.26) / pp.97-104  (Short paper, Oral)

  • Yuichiro Nakai, Takumi Hiraiwa, Ryuichi Tanimoto, Mitsunori Ozeki, Atsushi Taniguchi, Shigenori Nonaka, Hiromasa Oku, Viji Draviam, Noriko Hiroi, Akira Funahashi : High-speed microscopy with an electrically tunable lens to image the dynamics of in vivo molecular complexes, Quantitative Bioimaging Conference (QBI 2015) (Institut Pasteur, Paris, France, 2015.01.07) / submission ID, 47

  • Lihui Wang, Alvaro Cassinelli, Hiromasa Oku, Masatoshi Ishikawa : A pair of diopter adjustable eyeglasses for presbyopia vision correction, SPIE Optics + Photonics 2014 (San Diego, California, USA, 2014.08.18) / Proc. of SPIE, Vol.9193, 91931G-1 (poster) [doi:10.1117/12.2061659]

  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : Adaptive achromatic doublet design by double variable-focus lenses, SPIE Optics + Photonics 2014 (San Diego, California, USA, 2014.08.18) / Proc. of SPIE, Vol. 9193, 91930O-1 (Oral) [doi:10.1117/12.2061203]

  • Lihui Wang, Hiromasa Oku and Masatoshi Ishikawa : A Weak Power Enhanced Liquid-Membrane-Liquid Lens by a Pretension Elastic Membrane, Frontiers in Optics 2013, OSA's 97th annual meeting (Orlando, Florida, 2013.10.8) / Technical Digest FTu5F.5 (Oral) ,http://www.opticsinfobase.org/abstract.cfm?URI=FiO-2013-FTu5F.5

  • Kohei Okumura, Masato Ishii, Eri Tatsumi, Hiromasa Oku and Masatoshi Ishikawa : Gaze Matching Capturing for a High-speed Flying Object, International Conference on Instrumentation, Control, Information Technology and System Integration (SICE Annual Conference 2013) (Nagoya University, Nagoya, Japan, 2013.9.15) / Conference Proceedings, pp.649-654

  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : Acitve Projection AR using High-speed Optical Axis Control and Appearance Estimation Algorithm, 2013 IEEE International Conference on Multimedia and Expo (ICME 2013) (San Jose, USA, 2013.7.15) / Conference Proceedings [PDF (3.5MB)]*IEEE [doi:10.1109/ICME.2013.6607637]

  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : A solution of pre-tension membrane for improving the usability of liquid-membrane-liquid lens in its weak power area, 2nd EOS Conference on Optofluidics (EOSOF 2013) (Munich, 2013.5.14) / Abstract 1569716891 (Oral)

  • Hiromasa Oku, Kazuma Tsukamoto, Masatoshi Ishikawa : Measurement of temporal response characteristics of liquid-liquid interface with a pinned contact line for high-speed liquid lens design, 2nd EOS Conference on Optofluidics (EOSOF 2013) (Munich, 2013.5.14) / Abstract 1569714639_002 (poster)

  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : Development of variable-focal lens with liquid-membrane-liquid structure and 30mm optical aperture, SPIE Photonics West 2013 (San Francisco, 2013.2.7) / Proceedings 8617-5 (Oral)

  • Hiroki Deguchi, Hiromasa Oku, Masatoshi Ishikawa : Arbitrarily Focused Video Using High-speed Liquid Lens (Posters), 5th ACM SIGGRAPH Conference and Exhibition on Computer Graphics and Interactive Techniques in Asia (SIGGRAPH ASIA 2012) (Singapore, 2012.11.29-30)

  • Lihui Wang, Hiromasa Oku, Masatoshi Ishikawa : A Liquid Lens with Liquid-Membrane-Liquid Structure, Frontiers in Optics 2012, OSA's 96th annual meeting (Rochester, NY, 2012.10.15) / Technical Digest, FM3A.3 (Oral), http://www.opticsinfobase.org/abstract.cfm?URI=FiO-2012-FM3A.3

  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : Lumipen: Projection-Based Mixed Reality for Dynamic Objects, 2012 IEEE International Conference on Multimedia and Expo (ICME 2012) (Melbourne, 2012.7.11) / Conference Proceedings, pp.699-704 [PDF(0.8MB)] *IEEE [doi:10.1109/ICME.2012.34]

  • Kohei Okumura, Hiromasa Oku and Masatoshi Ishikawa : High-Speed Gaze Controller for Millisecond-order Pan/tilt Camera, 2011 IEEE International Conference on Robotics and Automation (ICRA 2011) (Shanghai, 2011.5.12) / Conference Proceedings, pp.6186-6191 [PDF (1.3MB)]*IEEE

  • Hiromasa Oku and Masatoshi Ishikawa : High-Speed Liquid lens for Computer Vision, 2010 IEEE International Conference on Robotics and Automation (ICRA 2010) (Anchorage, 2010.5.5) / Conference Proceedings, pp.2643-2648 [PDF (1.6MB)]*IEEE

  • Hiromasa Oku and Masatoshi Ishikawa : High-speed liquid lens with 2-ms response and 80.3-nm root-mean-square wavefront error, SPIE Photonics West 2010 (San Francisco, 2010.1.25) / Proceedings, 7594-07 [PDF (2.1MB)] (Oral)

  • Nobuyuki Mizoguchi, Hiromasa Oku, and Masatoshi Ishikawa : High-speed variable-focus optical system for extended depth of field, IEEE International Symposium on Industrial Electronics (ISIE 2009) (Seoul, 2009.7.8) / Proceedings, pp.1668-1673 [PDF (988K)]*IEEE (Oral)

  • Hiromasa Oku, Naoko Ogawa, Kogiku Shiba, Manabu Yoshida, and Masatoshi Ishikawa : How to Track Spermatozoa using High-Speed Visual Feedback, 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC 2008) (Vancouver, 2008.8.21) / Proceedings, pp.125-128 [PDF (1.5M)]*IEEE (Oral)

  • Takahiko Ishikawa, Hiromasa Oku, Masatoshi Ishikawa : Mobile microscope: A new concept for hand-held microscopes with image stabilization, 2008 IEEE International Conference on Robotics and Automation (ICRA 2008) (Pasadena, 2008.5.23) / Conference Proceedings, pp.3130-3134 [PDF (949K)]*IEEE

  • Takeshi Hasegawa, Naoko Ogawa, Hiromasa Oku and Masatoshi Ishikawa : A New Framework for Microrobotic Control of Motile Cells based on High-Speed Tracking and Focusing, 2008 IEEE International Conference on Robotics and Automation (ICRA 2008) (Pasadena, 2008.5.23) / Conference Proceedings, pp.3964-3969 [PDF (1.4M)]*IEEE (IEEE RAS Japan Chapter Young Award)

  • Soshiro Makise, Hiromasa Oku, and Masatoshi Ishikawa : Serial Algorithm for High-speed Autofocusing of Cells using Depth From Diffraction (DFDi) Method, 2008 IEEE International Conference on Robotics and Automation (ICRA 2008) (Pasadena, 2008.5.23) / Conference Proceedings, pp.3124-3129 [PDF (4.1M)]*IEEE

  • Anchelee Davies, Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Visualization and Estimation of Contact Stimuli using Living Microorganisms, 2006 IEEE International Conference on Robotics and Biomimetics (ROBIO 2006) (Kunming, 2006.12.18) / Proceedings, pp.445-450 [PDF (316K)]*IEEE (Best Paper in Biomimetics)

  • Hiromasa Oku, and Masatoshi Ishikawa : Rapid Liquid Variable-Focus Lens with 2-ms Response, 19th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2006) (Montreal, 2006.11.2) / Proceedings, pp.947-948 [PDF (527K)]*IEEE

  • Koichi Hashimoto, Kiyonori Takahashi, Naoko Ogawa, and Hiromasa Oku : Visual Feedback Control for a Cluster of Microorganisms, SICE-ICASE International Joint Conference 2006 (SICE-ICCAS 2006) (Busan, 2006.10.20) / Proceedings, pp.4198-4201

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Dynamics Modeling and Real-Time Observation of Galvanotaxis in Paramecium caudatum toward Robotic Maneuvering, The 3rd International Symposium on Aero Aqua Bio-mechanisms (ISABMEC 2006) (Okinawa, 2006.7.5) / Proceedings, P02

  • Hiromasa Oku, Theodorus, Koichi Hashimoto, and Masatoshi Ishikawa : High-speed Focusing of Cells Using Depth-From-Diffraction Method, 2006 IEEE International Conference on Robotics and Automation (ICRA 2006) (Orlando, 2006.5.18) / Proceedings, pp.2626-2641 [PDF (716K)]*IEEE

  • Kiyonori Takahashi, Naoko Ogawa, Hiromasa Oku, and Koichi Hashimoto : Organized Motion Control of a lot of Microorganisms Using Visual Feedback, 2006 IEEE International Conference on Robotics and Automation (ICRA 2006) (Orlando, 2006.5.16) / Proceedings, pp.1408-1413 [PDF (3.1M)]*IEEE

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Evaluation and Suppression of Overrun of Microorganisms using Dynamics Model for Microrobotic Application, 9th International Conference on Intelligent Autonomous Systems (IAS-9) (Kashiwa, 2006.3.8) / Intelligent Autonomous Systems 9 (T. Arai et al. Eds.), pp.1015-1024, IOS Press

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Microrobotic Control of Paramecium Cells using Galvanotaxis, 2005 IEEE International Conference on Robotics and Biomimetics (ROBIO 2005) (Macau, 2005.7.3) / ROBIO'05 Workshop on Biomimetic Robotics and Biomimetic Control, pp.23-35

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Dynamic Model of Paramecium Galvanotaxis for Microrobotic Application, 2005 IEEE International Conference on Robotics and Automation (ICRA 2005) (Barcelona, 2005.4.19) / Proceedings, pp. 1258-1263 [PDF (341K)]*IEEE

  • Hiromasa Oku, Naoko Ogawa, Koichi Hashimoto, and Masatoshi Ishikawa : Microorganism Tracking Microscope System, 2005 IEEE International Conference on Robotics and Automation (ICRA 2005) (Barcelona, 2005.4.18-22) / Video Proceedings [Video (WMV, 20M)] [PDF (112K)]*IEEE

  • Theodorus, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Optical axis tracking of microorganism using high speed vision, Focus on Microscopy 2005 (Jena, 2005.3.22) / Program and Abstract Book, p.105

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Motile Cell Galvanotaxis Control using High-Speed Tracking System, 2004 IEEE International Conference on Robotics and Automation (ICRA 2004) (New Orleans, 2004.4.28) / Proceedings, pp.1646-1651 [PDF (1.7M)]*IEEE

  • Naoko Ogawa, Hiromasa Oku, Koichi Hashimoto, and Masatoshi Ishikawa : Single-cell level continuous observation of microorganism galvanotaxis using high-speed vision, 2004 IEEE International Symposium on Biomedical Imaging (ISBI 2004) (Arlington, 2004.4.18) / Proceedings, pp.1331-1334 [PDF (1.0M)]*IEEE

  • Hiromasa Oku, and Masatoshi Ishikawa : A Variable-Focus Lens with 1kHz Bandwidth Applied to Axial-Scan of A Confocal Scanning Microscope, 16th Annual Meeting of the IEEE Lasers & Electro-Optics Society (LEOS 2003) (Tucson, 2003.10.26-30) / Proceedings, Vol.1, pp.309-310 [PDF (459K)]*IEEE

  • Hiromasa Oku, Idaku Ishii, and Masatoshi Ishikawa : Tracking a Protozoon Using High-Speed Visual Feedback, 1st Annual International IEEE-EMBS Special Topic Conference on Microtechnologies in Medicine & Biology(\(\(\(Lyon, France, Oct. 12-14, 2000) / Proceedings, pp.156-159

Conference (not academic)

  • Chikara Miyaji, Yuki Inaba, Hiromasa Oku, Takanori Abe, Katsutoshi Saito and Kazuto Yoshida : Developing an immediate feedback system on ball rotation speed in table tennis, Japan Table Tennis Association Sports Science and Medicine Committee International Meeting (National Training Center, Tokyo, 2015.09.20) / Programme and Abstracts, p.11

Media

[Newspaper / TV]

  • Moving Images, NEWSROOM TOKYO, NHK WORLD, 2017 December 19

  • Researchers project the future of smart phones, Reuters, 2013 June 30

  • Camera system brings new focus to ball sports, Reuters, 2012 July 29

  • EYE ON THE BALL，Tech Universe, The New Zealand Herald, 2012 July 20

[Web etc.]

  • Lumipen2, IEEE Spectrum, 2015 March 27

  • Speed of sight, The Dynamic Image Control Camera is a high-speed tracking device that could change sports film technology forever., now!, vodacom, 2013 August 7

  • Dynamic target tracking camera system keeps its eye on the ball, Diginfo TV, 2013 June 18

  • Tingly projections make beamed gadgets come alive, NewScientist, 2013 May 30

  • Very Smart Phone Reimagines `Talk to the Hand', ABC news, 2013 May 17

  • Câmera focaliza objetos em movimento em tempo real, TecMundo, 2012 July 21

  • Robot Eyes Track Ping Pong Balls, BLOGS//AUTOMATION, IEEE Spectrum, 2012 July 18

  • Câmera super-rápida acompanha bolinha de pingue-pongue, Inovação Tecnológica, 2012 July 17

  • High-speed camera could track a speeding ball, puck or player, GadgetBox on NBCNews.com TECH, 2012 July 17

  • Tecnología para el seguimiento de objetos con cámaras de alta velocidad, Microsiervos, 2012 July 17

  • Video: Camera Uses Ultra-Fast Mirrors to Perfectly Track a Ping-Pong Ball in Play, Popular Science, 2012 July 17

  • Sistema de seguimiento ultra rápido que no pierde de vista una pelota de ping pong, FayerWayer, 2012 July 16

  • Super-fast motion tracking camera uses rotating mirrors to stay locked on target, The Verge, 2012 July 16

  • Superfast mirrors track a ping-pong ball in flight, One Per Cent, NewScientist, 2012 July 16

  • 1ms pan-tilt camera system tracks the flying balls (w/ Video), Phys.org, 2012 July 15

  • Camera system automatically keeps fast-moving subjects centered in the shot, Gizmag, 2012 July 13

  • Rapid response liquid lens can change focal length in 2 milliseconds, Computer Vision Central, 2009 December 20

*IEEE © 2001-2013 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.

 

*AIP © 2005, 2009, 2013 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The article appeared in L. Wang et al.,Appl. Phys. Lett. 102, 131111 (2013) and may be found at http://link.aip.org/link/?APL/102/131111. The article appeared in H. Oku et al.,Appl. Phys. Lett. 94, 221108 (2009) and may be found at http://link.aip.org/link/?APL/94/221108. The article appeared in H. Oku et al.,Rev. Sci. Instrum. 76, 034301 (2005) and may be found athttp://link.aip.org/link/?RSINAK/76/034301/1.

 

*Elsevier © 2006 Elsevier B.V.

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