KEIO RESEARCHERS INFORMATION SYSTEM

Papers 【 Display / hide 】

Papers 【 Display / hide 】

• Weaving and Disguising Infrared Markers toward Invisible Textile Interaction

  H Sugiyama, H Lee, H Fujino, M Kuwana, MD Dogan, L He, K Narumi

  Proceedings of the Extended Abstracts of the 2026 CHI Conference on Human …  2026.04

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  Textiles have emerged as ubiquitous substrates for embedding information and enabling digital interaction. However, conventional visual markers often compromise garment aesthetics. This paper proposes a method to design and fabricate visually unobtrusive yet readable markers using near-infrared (NIR)-absorbing yarns. These yarns maintain visual consistency with standard fibers under ambient light while providing high contrast under NIR imaging. To enhance invisibility, we also explored four disguising methods: yarn plying, pattern decoying, inkjet overprinting, and post-dyeing. To evaluate our technique, we investigated both the invisibility and readability of woven markers through a preliminary user study and quantitative analysis of NIR imaging. Finally, we demonstrated a T-shirt prototype with a woven QR code, highlighting its potential for interactive applications.

  • Access to Document (DOI)

• Zip-up Print: Rapid and Assemblable 3D printing Using 2D Flattened Zipper-like Structures

  T Yamamoto, J Li, A Zaman, N Barnes, Y Sugiura, S Mueller, K Narumi

  Proceedings of the 2026 CHI Conference on Human Factors in Computing Systems …  2026.04

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  We propose a method to fabricate objects composed of 3D printed flattened pieces with integrated zipper-like structures. The object is manually assembled into a 3D shape by connecting the zipper components. By employing a zipper design that allows for angle-independent connections between patches, our method enables both the surface and zipper components to be printed in the same orientation, resulting in high-quality reconstruction of the input model with a faster 3D printing process that wastes less material. We implement a fully automated pipeline that takes a 3D model as input, converts it into developable patches, generates the zipper structures, and flattens them for subsequent 3D printing. We demonstrate that our approach significantly reduces the fabrication time and support material consumption. We also present application examples that highlight the versatility of our method.

  • Access to Document (DOI)

• Id tag and detecting system

  T IIZUKA, G ITAMI, N KOSAKA, M Maruyama, T Tanaka, A Koyama, J Kato, ...

  US Patent App. 18/850,301  2026

• GadJets: Air-Jet-Actuated Passive Materials and Mechanisms for Actuated and Shape-Changing Interfaces

  S Oka, WY Yang, Y Zou, M Fukuoka, K Narumi, Y Kakehi, K Nakagaki

  Proceedings of the Twentieth International Conference on Tangible, Embedded …  2026

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  We propose GadJets, an approach to remotely actuating passive materials and mechanisms using air jets for interactive and shape-changing tangible user interfaces (TUIs). Compared to previous HCI research in remote actuation, air jets offer relatively strong, distant, and safe actuation with simple control. Leveraging these advantages, we can selectively actuate multiple passive materials and mechanisms (or GadJet modules) using only one actuator. We defined a design space to outline the basic architecture and generalizable primitives for air-jet-based TUIs. Also, we exemplified our approach with diverse GadJets modules and proof-of-concept implementation of a computer-controlled air jet system. Finally, we developed a visualization system of the estimated air range based on pre-collected data to support user control. With the vision of deploying multiple passive GadJet modules in an environment fused with the actuated air jets, we demonstrated applications of interactive tabletop objects, an actuated workbench, and an actuated shelf.

  • Access to Document (DOI)

• Viewpoint Suggestion of Feature-Rich Photos Using Smartphone Photogrammetry and Keypoint Detection

  H Ono, K Narumi, Y Uranishi

  2026 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and …    1043 - 1044 2026

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  We propose a smartphone-based system that automatically suggests the suitable camera position and angle to a target object when we try to take a feature-rich photo of it. The system first captures a 3D mesh of the object using photogrammetry and virtually takes photos of the mesh from different positions and angles. Then, the system extracts and compares the keypoints of each virtual shot and outputs the one with the largest number of keypoints. We describe the system and demonstrate its effectiveness through examples.

  • Access to Document (DOI)

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Reviews, Commentaries, etc. 【 Display / hide 】

Reviews, Commentaries, etc. 【 Display / hide 】

• Laser Pouch Motors: Selective and Wireless Activation of Soft Actuators by Laser-Powered Liquid-to-Gas Phase Change

  Takefumi Hiraki and Kenichi Nakahara and Koya Narumi and Ryuma Niiyama and Noriaki Kida and Naoki Takamura and Hiroshi Okamoto and Yoshihiro Kawahara

  IEEE Robotics and Automation Letters (Institute of Electrical and Electronics Engineers ({IEEE}))  5 ( 3 ) 4180 - 4187 2020.07

  • Access to Document (DOI)

• Liquid Pouch Motors: Printable Planar Actuators Driven by Liquid-to-Gas Phase Change for Shape-Changing Interfaces

  Koya Narumi and Hiroki Sato and Kenichi Nakahara and Young ah Seong and Kunihiko Morinaga and Yasuaki Kakehi and Ryuma Niiyama and Yoshihiro Kawahara

  IEEE Robotics and Automation Letters (Institute of Electrical and Electronics Engineers ({IEEE}))  5 ( 3 ) 3915 - 3922 2020.07

  • Access to Document (DOI)

Research Projects of Competitive Funds, etc. 【 Display / hide 】

Research Projects of Competitive Funds, etc. 【 Display / hide 】

• ジャカード織機を用いた機能性テキスタイルの計算製造とインタラクション

  2025.04

  -

  2028.03

  基盤研究(A), Principal investigator

• 機能性と製造性をつなぐ自己折り技術

  2024.04

  -

  2027.03

  学術変革領域研究(B), Principal investigator

Courses Taught 【 Display / hide 】

Courses Taught 【 Display / hide 】

• SPECIAL TOPICS IN INFORMATION AND COMPUTER SCIENCE

  2026

• BACHELOR'S THESIS

  2026

• VISUAL COMPUTING 2

  2026

• JIGA-SAKKO PROJECT 4

  2026

• VISUAL COMPUTING 1 B

  2026

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