LineChaser: A Smartphone-Based Navigation System for Blind People to Stand in Line
Masaki Kuribayashi*, Seita Kayukawa*, Hironobu Takagi, Chieko Asakawa, and Shigeo Morishima
(* - equal contribution)
We present an assistive system, LineChaser, that helps blind people stand in lines in public spaces by using only off-the-shelf smartphones.
Phase1:
LineChaser determines whether nearby pedestrians are standing in line or not and navigates the blind user to the end of a line.
Phase1:
LineChaser determines whether nearby pedestrians are standing in line or not and navigates the blind user to the end of a line.
Phase2:
LineChaser tracks the last person of the line and guides users to stay correctly positioned by using audio and vibration signals.
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Abstract
Standing in line is one of the most common social behaviors in public spaces but can be challenging for blind people. We propose an assistive system named LineChaser, which navigates a blind user to the end of a line and continuously reports the distance and direction to the last person in the line so that they can be followed. LineChaser uses the RGB camera in a smartphone to detect nearby pedestrians, and the built-in infrared depth sensor to estimate their position. Via pedestrian position estimations, LineChaser determines whether nearby pedestrians are standing in line, and uses audio and vibration signals to notify the user when they should start/stop moving forward. In this way, users can stay correctly positioned while maintaining social distance. We have conducted a usability study with 12 blind participants. LineChaser allowed blind participants to successfully navigate lines, significantly increasing their confidence in standing in lines.
Publication
Masaki Kuribayashi*, Seita Kayukawa*, Hironobu Takagi, Chieko Asakawa, and Shigeo Morishima (* - equal contribution). 2021. LineChaser: A Smartphone-Based Navigation System for Blind People to Stand in Line. In Proceedings of the 2021 CHI Conference on Human Factors in Computing Systems (CHI 2021).
CHI 2021 DOI Presentation Video Paper BibTeX Azusa Ono Memorial Award

栗林雅希*, 粥川青汰*, 髙木啓伸, 浅川智恵子, 森島繁生 (* - equal contribution). LineChaser: 視覚障碍者が列に並ぶためのスマートフォン型支援システム. インタラクティブシステムとソフトウェアに関するワークショップ (WISS). 2020. (査読あり, 口頭発表)
WISS 2020 Talk Slide Paper 最優秀論文賞
Authors
Waseda University
Waseda University
IBM Research
IBM Research
Waseda Research Institute for Science and Engineering
IBM Research
IBM Research
Waseda Research Institute for Science and Engineering
(* - equal contribution)
Related Project
Seita Kayukawa, Hironobu Takagi, João Guerreiro, Shigeo Morishima, and Chieko Asakawa
CHI EA 2020
Media
Acknowledgements
We would like to thank all participants who took part in our user study. We would also thank João Guerreiro, Asuka Hirata, and Yoshiki Kubotani for their support. This work was supported by JST-Mirai Program (JPMJMI19B2), JSPS KAKENHI (JP20J23018), and Grant-in-Aid for Young Scientists (Early Bird, Waseda Research Institute for Science and Engineering, BD070Z003100).