1. Seiya Hirai, Tatsuho Nagatomo, Takefumi Hiraki, Hiroki Ishizuka, Yoshihiro Kawahara, and Norihisa Miki: “Micro Elastic Pouch Motors: Elastically Deformable and Miniaturized Soft Actuators Using Liquid-to-Gas Phase Change,” IEEE Robotics and Automation Letters (Proceedings of the 4th IEEE International Conference on Soft Robotics – RoboSoft 2021), vol. 6, no. 3, pp. 5373–5380 (2021.4).
  2. Tatsuya Usui, Hiroki Ishizuka, Takefumi Hiraki, Yoshihiro Kawahara, Sei Ikeda, and Osamu Oshiro: “Fully Flexible Liquid-to-gas Phase Change Actuators with Integrated Liquid Metal Heaters,” Japanese Journal of Applied Physics, vol. 60, pp. SCCL11:1–10 (2021.3).
  3. Yushi Sato, Takefumi Hiraki, Naruki Tanabe, Haruka Matsukura, Daisuke Iwai, and Kosuke Sato: “Modifying Texture Perception With Pseudo-Haptic Feedback for a Projected Virtual Hand Interface,” IEEE Access, vol. 8, pp. 120473–120488 (2020.7). [PDF]
  4. Satoshi Abe, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Imperceptible Color Vibration for Screen–Camera Communication via 2D Binary Pattern,” ITE Transactions on Media Technology and Applications, vol. 8, no. 3, pp. 170–185 (2020.7). [PDF]
  5. Takefumi Hiraki*, Kenichi Nakahara*, Koya Narumi*, Ryuma Niiyama, Noriaki Kida, Naoki Takamura, Hiroshi Okamoto, and Yoshihiro Kawahara: “Laser Pouch Motors: Selective and Wireless Activation of Soft Actuators by Laser-powered Liquid-to-gas Phase Change,” IEEE Robotics and Automation Letters (Proceedings of the 3rd IEEE International Conference on Soft Robotics – RoboSoft 2020), vol. 5, no. 3, pp. 4180–4187 (2020.7). (* These authors contributed equally.) [PDF]
  6. Takefumi Hiraki, Yoshihiro Kawahara, and Takeshi Naemura: “Projection-based Control for Mobile Robots Cooperating with Displayed Images,” Transactions on the Virtual Reality Society of Japan, vol. 25, no. 2, pp. 148–157 (2020.6). (in Japanese) [PDF]
  7. Tatsuyuki Ueda, Daisuke Iwai, Takefumi Hiraki, and Kosuke Sato: “IlluminatedFocus: Vision Augmentation using Spatial Defocusing via Focal Sweep Eyeglasses and High-Speed Projection,” IEEE Transactions on Visualization and Computer Graphics (Proceedings of the 27th IEEE Conference on Virtual Reality and 3D User Interfaces – IEEE VR 2020), vol. 25, no. 5, pp. 2051–2061 (2020.3). [PDF (arXiv)]
  8. Ikuo Kamei, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “PILC Projector: Image Projection With Pixel-level Infrared Light Communication,” IEEE Access, vol. 7, pp. 160768–160778 (2019.10). [PDF]
  9. Takefumi Hiraki, Shogo Fukushima, Hiroshi Watase, and Takeshi Naemura: “Dynamic PVLC: Pixel-level Visible Light Communication Projector with Interactive Update of Images and Data,” ITE Transactions on Media Technology and Applications, vol. 7, no. 4, pp. 160–168 (2019.10). [PDF]
  10. Akira Matsumoto, Satoshi Abe, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Imperceptible AR Markers for Near-screen Mobile Interaction,” IEEE Access, vol. 7, pp. 79927–79933 (2019.6). [PDF]
  11. Takefumi Hiraki, Shogo Fukushima, Yoshihiro Kawahara, and Takeshi Naemura: “Phygital Field: An Integrated Field with Physical Robots and Digital Images using Projection-based Localization and Control Method,” SICE Journal of Control, Measurement, and System Integration, vol. 11, no. 4, pp. 302–311 (2018.7).
  12. Takefumi Hiraki, Mika Koizumi, Leijie Zhou, Shogo Fukushima, and Takeshi Naemura: “Reconfigurable Pixel-level Visible Light Communication with Light Source Control,” Transactions on the Virtual Reality Society of Japan, vol. 21, no. 1, pp. 197–-206 (2016.3). (in Japanese) [PDF]
  1. Satoshi Abe, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Imperceptible QR Code on Display Using Image Color Vibration,” Image Laboratory, vol. 32, no. 3, 7 pages (2021.3). (in Japanese)
  1. Tatsuya Usui, Hiroki Ishizuka, Takefumi Hiraki, Yoshihiro Kawahara, Sei Ikeda, and Osamu Oshiro: “Miniaturized Liquid Pouch Motors Using Flexible Liquid Metal Heater,” In Proceedings of the 33rd International Microprocesses and Nanotechnology Conference (MNC 2020), pp. 5-26:1–2 (2020.11). [PDF]
  2. Liyuan Duan, Haruka Matsukura, Parinya Punpongsanon, Takefumi Hiraki, Daisuke Iwai, and Kosuke Sato: “Adaptive Visualization of Gas Distribution Using Augmented Reality Glasses,” In Proceedings of the 9th IEEE Global Conference on Consumer Electronics (GCCE 2020), pp. 585–586 (2020.10). [PDF]
  3. Kohei Morita, Takefumi Hiraki, Haruka Matsukura, Daisuke Iwai, and Kosuke Sato: “Extension of Projection Area using Head Orientation in Projected Virtual Hand Interface for Wheelchair Users,” In Proceedings of 59th Annual Conference of the Society of Instrument and Control Engineers (SICE 2020), pp. 421–426 (2020.9). [PDF]
  4. Yamato Miyatake, Takefumi Hiraki, Tomosuke Maeda, Daisuke Iwai, and Kosuke Sato: “Visuo-Haptic Display by Embedding Imperceptible Spatial Haptic Information into Projected Images,” Haptics: Science, Technology, Applications (Proceedings of the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications – EuroHaptics 2020), Lecture Notes in Computer Science, vol. 12272, pp. 226–234 (2020.9). [PDF]
  5. Takefumi Hiraki, Shogo Fukushima, Hiroshi Watase, and Takeshi Naemura: “Pixel-level Visible Light Communication Projector with Interactive Update of Images and Data,” In Proceedings of International Display Workshops (IDW 2018), pp. 1192–1195 (2018.12). [PDF]
  6. Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Projection-based Localization and Navigation Method for Multiple Mobile Robots with Pixel-level Visible Light Communication,” In Proceedings of the 2016 IEEE/SICE International Symposium on System Integration (SII 2016), pp. 862–868 (2016.12). [PDF]
  7. Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Sensible Shadow: Tactile Feedback from Your Own Shadow,” In Proceedings of 7th Augmented Human International Conference (AH 2016), pp. 23:1–23:4 (2016.2). [PDF]
  1. Takefumi Hiraki*, Tomohiro Hayase*, Yuichi Ike*, Takashi Tsuboi, and Michio Yoshiwaki: “Viewpoint Planning of Projector Placement for Spatial Augmented Reality using Star-Kernel Decomposition,” In Proceedings of the 28th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR 2021), 2 pages (2021.3). (* These authors contributed equally.) (to appear)
  2. Ikuo Kamei, Changyo Han, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “CoVR: Co-located Virtual Reality Experience Sharing for Facilitating Joint Attention via Projected View of HMD Users,” In ACM SIGGRAPH Asia 2020 Emerging Technologies, Talk (SA 2020), pp. 14:1–2 (2020.12). [PDF]
  3. Yamato Miyatake, Takefumi Hiraki, Tomosuke Maeda, Daisuke Iwai, and Kosuke Sato: “HaptoMapping: Visuo-Haptic AR System using Projection-based Control of Wearable Haptic Devices,” In ACM SIGGRAPH Asia 2020 Emerging Technologies, Talk (SA 2020), pp. 7:1–2 (2020.12). [PDF]
  4. Rei Kawakami, Ikuo Kamei, Changyo Han, Takefumi Hiraki, Yuzuko Utsumi, Yasuaki Kakehi, and Takeshi Naemura: “OUR Shurijo: Shurijo Castle Digital Reconstruction Project,” In International Conference on 3D Vision (3DV 2020), Demos, 7 (2020.11).
  5. Ryusei Uramune, Hiroki Ishizuka, Takefumi Hiraki, Yoshihiro Kawahara, Sei Ikeda, and Osamu Oshiro: “HaPouch: Soft and Wearable Haptic Display Devices using Liquid-to-gas Phase Change Actuator,” In Adjunct Proceedings of the 33rd Annual ACM Symposium on User Interface Software and Technology (UIST 2020), pp. 53–55 (2020.10). [PDF]
  6. Ryusei Uramune, Hiroki Ishizuka, Takefumi Hiraki, Yoshihiro Kawahara, Sei Ikeda, and Osamu Oshiro: “Inflatable Soft Haptic Device using Liquid-to-gas Phase Change Actuator,” In the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications (EuroHaptics 2020), Work in Progress, 201 (2020.9).
  7. Ryusei Uramune, Hiroki Ishizuka, Takefumi Hiraki, Yoshihiro Kawahara, Sei Ikeda, and Osamu Oshiro: “Demonstration of Inflatable Soft Haptic Device using Liquid-to-gas Phase Change Actuator,” In the 12th International Conference on Human Haptic Sensing and Touch Enabled Computer Applications (EuroHaptics 2020), Demos, 202 (2020.9).
  8. Takefumi Hiraki, Shogo Fukushima, Yoshihiro Kawahara, and Takeshi Naemura: “NavigaTorch: Projection-based Robot Control Interface using High-speed Handheld Projector,” In ACM SIGGRAPH Asia 2019 Emerging Technologies, Talk (SA 2019), pp. 31–33 (2019.11).
  9. Yushi Sato, Naruki Tanabe, Kohei Morita, Takefumi Hiraki, Parinya Punpongsanon, Haruka Matsukura, Daisuke Iwai, and Kosuke Sato: “Pseudo-Haptic Feedback in a Projected Virtual Hand for Tactile Perception of Textures,” In Adjunct Proceedings of the 2019 IEEE World Haptics Conference (WHC 2019), pp. WP1P.09:1–2 (2019.7).
  10. Yushi Sato, Naruki Tanabe, Kohei Morita, Takefumi Hiraki, Parinya Punpongsanon, Haruka Matsukura, Daisuke Iwai, and Kosuke Sato: “Pseudo-Haptic Feedback in a Projected Virtual Hand for Tactile Perception of Textures,” In the 2019 IEEE World Haptics Conference (WHC 2019), Hands-on Demos, DM2.09 (2019.7).
  11. Ikuo Kamei, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “PILC Projector: RGB-IR Projector for Pixel-level Infrared Light Communication,” In Proceedings of the 26th IEEE Conference on Virtual Reality and 3D User Interfaces (IEEE VR 2019), pp. 1004–1005 (2019.3).
  12. Takefumi Hiraki, Masaaki Fukumoto, and Yoshihiro Kawahara: “Touchable Wall: Easy-to-Install Touch-Operated Large-Screen Projection System,” In Proceedings of the 2018 ACM International Conference on Interactive Surfaces and Spaces (ISS 2018), pp. 465–468 (2018.11).
  13. Satoshi Abe, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Screen–Camera Communication via Matrix Barcode Utilizing Imperceptible Color Vibration,” In Adjunct Proceedings of the 31st Annual ACM Symposium on User Interface Software and Technology (UIST 2018), pp. 166–168 (2018.10).
  14. Takefumi Hiraki, Yoshihiro Kawahara, and Takeshi Naemura: “Projection-based Localization and Control Method of Robot Swarms for Swarm User Interfaces,” In Proceedings of the 2018 ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp 2018), pp. 584–589 (2018.10).
  15. Satoshi Abe, Atsuro Arami, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Imperceptible Color Vibration for Embedding Pixel-by-Pixel Data into LCD Images,” In Proceedings of the 2017 ACM Conference Extended Abstracts on Human Factors in Computing Systems (CHI EA 2017), pp. 1464–1470 (2017.5).
  16. Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Phygital Field: an Integrated Field with a Swarm of Physical Robots and Digital Images,” In ACM SIGGRAPH Asia 2016 Emerging Technologies, Talk (SA 2016), pp. 2:1–2:2 (2016.12). [PDF]
  17. Takefumi Hiraki*, Koya Narumi*, Koji Yatani, and Yoshihiro Kawahara: “Phones on Wheels: Exploring Interaction for Smartphones with Kinetic Capabilities,” In Adjunct Proceedings of the 29th Annual ACM Symposium on User Interface Software and Technology (UIST 2016), pp. 121–122 (2016.10). (* These authors contributed equally.)
  18. Takefumi Hiraki, Yasuaki Kakehi, and Yoshihiro Kawahara: “Basic Estimation of Internal Power Harvesting in the Mouth Cavity,” In Adjunct Proceedings of the 2016 ACM International Joint Conference on Pervasive and Ubiquitous Computing (UbiComp 2016), pp. 954–957 (2016.9). [PDF]
  19. Takefumi Hiraki, Issei Takahashi, Shotaro Goto, Shogo Fukushima, and Takeshi Naemura: “Phygital Field: Integrated Field with Visible Images and Robot Swarm Controlled by Invisible Images,” In ACM SIGGRAPH 2015 Posters (SIGGRAPH 2015), p. 85:1 (2015.8). [PDF]
  1. Excellent Student Paper Award, Bronze Prize, IEEE GCCE 2020 (Liyuan Duan, Haruka Matsukura, Parinya Punpongsanon, Takefumi Hiraki, Daisuke Iwai, and Kosuke Sato: “Adaptive Visualization of Gas Distribution Using Augmented Reality Glasses”) (2020.10).
  2. Top-3 for Best Poster Award, EuroHaptics 2020 (Ryusei Uramune, Hiroki Ishizuka, Takefumi Hiraki, Yoshihiro Kawahara, Sei Ikeda, and Osamu Oshiro: “Inflatable Soft Haptic Device using Liquid-to-gas Phase Change Actuator”) (2020.9).
  3. Kansai-section Joint Convention of Institutes of Electrical Engineering Incentive Award (Akira Watanabe, Takefumi Hiraki, Daisuke Iwai, and Kosuke Sato: “Virtual Calligraphy Performance Experience with a Large Screen”) (2020.1).
  4. SICE Measurement Division Best Paper Award (Takefumi Hiraki, Shogo Fukushima, Yoshihiro Kawahara, and Takeshi Naemura: “Phygital Field: An Integrated Field with Physical Robots and Digital Images using Projection-based Localization and Control Method”) (2019.8).
  5. Electrical Science and Engineering Promotion Student Paper Award (Takefumi Hiraki, Shogo Fukushima, Hiroshi Watase, and Takeshi Naemura: “Pixel-level Visible Light Communication Projector with Interactive Update of Images and Data”) (2019.3).
  6. IEICE Human Communication Award (Atsuro Arami, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Encoding Scheme for Improving Image Quality and Data Transfer Rate of PVLC Projector”) (2018.12).
  7. IEICE MVE Award (Best Paper Award) (Atsuro Arami, Takefumi Hiraki, Shogo Fukushima, and Takeshi Naemura: “Encoding Scheme for Improving Image Quality and Data Transfer Rate of PVLC Projector”) (2018.1).
  8. METI Innovative Technologies 2016 (Naemura Lab., the University of Tokyo: “Phygital Field”) (2016.10).
  9. IEICE MVE Award (Best Paper Award) (Takefumi Hiraki, Issei Takahashi, Shogo Fukushima, and Takeshi Naemura: “Controlling Swarms of Robots using a PVLC Projector”) (2015.10).