2022 Fiscal Year Final Research Report

Development of environmentally adaptive and individually adaptive contrast-enhancing lighting technology to improve nighttime driving safety for older people.

Research Project

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Project/Area Number	19K04724
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 23020:Architectural environment and building equipment-related
Research Institution	University of Fukui
Principal Investigator	Akashi Yukio 福井大学, 学術研究院工学系部門, 教授 (10456436)
Project Period (FY)	2019-04-01 – 2023-03-31
Keywords	輝度コントラスト / 高齢者 / 順応輝度 / 偏心角 / ヘッドライト / Adaptive Driving Beam / Light Emitting Diode / 白内障
Outline of Final Research Achievements	As aging, the eye's lens becomes cloudy, resulting in a decrease in contrast sensitivity. It is essential to improve the luminance contrast of visual targets according to individual visual characteristics to facilitate the detection of important visual targets such as pedestrians and obstacles on the road for driving safety. In order to develop a contrast-enhancing lighting system that improves the safety of older people when driving at night by controlling the interlocking of automobile headlights and roadway lighting, this study determines whether pedestrians and obstacles can be detected according to individual visual characteristics and changes in the road environment. We constructed a visual detection model for peripheral vision and an adaptation luminance calculation algorithm that determines adaptation luminance from the driver's complex field of vision. Furthermore, the effectiveness of the above-described system was demonstrated through outdoor field experiments.
Free Research Field	建築環境工学
Academic Significance and Societal Importance of the Research Achievements	本研究の学術的な意義は、高齢者の視覚特性に対応した、これまでにない新規な周辺視の視認性モデルを構築すること、複雑な視野情報から周辺視の順応状態を把握できる新規な画像解析アルゴリズムを構築するためのデータベースを提供することである。本研究の社会的な意義は、コントラスト感度の低下により交通安全を脅かされていた高齢者の視覚支援のために、最新のハード技術を活用して視対象のコントラストを高める新規な「コントラスト向上照明システム」を創造することである。