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Non-contact measurement of human oral breathing by using far infrared imaging

Research Project

Project/Area Number 21K11981
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 61020:Human interface and interaction-related
Research InstitutionNagoya City University

Principal Investigator

Hanawa Dai  名古屋市立大学, 大学院芸術工学研究科, 教授 (50422506)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords遠赤外線画像 / 非接触計測 / 口呼吸 / 流量 / 流速
Outline of Research at the Start

本研究課題では,人間の口呼吸における流速および流量を,遠赤外線画像を用いて非接触かつ定量的に計測できる手法の確立を目指す.具体的にはまず,口呼吸における口腔内の温度分布と,外気の吸入速度と吸入量,および,呼気の排出速度と排出量との関連性を分析し,流速や流量の推定に有効な特徴量の抽出を試みる.次に,口呼吸における流速と流量を,遠赤外線画像を用いて,いずれも実時間かつ定量的に推定できる手法を考案する.さらに,これらの推定を自動化および簡易化する方法について検討する.

Outline of Final Research Achievements

In this research, we studied the feasibility of a method for non-contact measurement of quantitative flow volume in human oral breathing by using far-infrared imaging. We first study a method to extract the region of interest including mouth on far-infrared images and its automation. We next compared the flow volume of oral breathing and the air temperature of inhalation/exhalation by conducting experiments. Moreover, we compared the oral regions on far-infrared images and the air temperature. As a result, we found the possibility that the quantitative flow volume of oral breathing can be estimated in a non-contact manner by using far-infrared images.

Academic Significance and Societal Importance of the Research Achievements

従来,人間の口呼吸における流量は,ユーザに計測機器を装着させる接触型の方法でのみ,定量的な計測が可能であった.そのため,日常生活への応用に向けては,身体的・精神的な負担,計測機器脱着の危険性,複数人の同時計測が困難などの課題があった.本研究では,遠赤外線画像を用いた方法により,口呼吸における呼気・吸気の流量を,非接触かつ定量的に推定できる可能性,および,可視光画像の併用による自動化の可能性を示すことができた.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2024 2023 2022 Other

All Int'l Joint Research (2 results) Journal Article (3 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 2 results)

  • [Int'l Joint Research] 国立台湾科技大学(台湾)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 国立台湾科技大学(その他の国・地域)

    • Related Report
      2021 Research-status Report
  • [Journal Article] 遠赤外線画像と可視光画像を用いた口呼吸の非接触型流量推定手法の検討2024

    • Author(s)
      赤堀祥,塙大,小口喜美夫
    • Journal Title

      電子情報通信通信学会技術研究報告

      Volume: - Pages: 159-164

    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] A feasibility study on noncontact estimation of the flow volume of nasal breathing by using far infrared imaging2023

    • Author(s)
      Dai Hanawa, Sho Akahori, Kimio Oguchi
    • Journal Title

      Proc. of the 12th Int. Multi-Conf. on Eng. and Tech. Innovation

      Volume: -

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Relationship between the nasal region on facial thermal images and the flow velocity of nasal breathing2022

    • Author(s)
      Dai Hanawa, Kimio Oguchi
    • Journal Title

      Proc. of 2022 IEEE 4th Global Conference on Life Science and Technologies

      Volume: - Pages: 34-35

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research

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Published: 2021-04-28   Modified: 2025-01-30  

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