Creation and application of dynamic phosphorescent markers by high-speed imaging of additive-free phosphorescent phenomena

2023 Fiscal Year Final Research Report

• Project/Area Number: 20H04204
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 61010:Perceptual information processing-related
• Research Institution: Tokyo University of Science (2023); The University of Tokyo (2020-2022)
• Principal Investigator: Hayakawa Tomohiko 東京理科大学, 研究推進機構総合研究院, 准教授 (10747843)
• Project Period (FY): 2020-04-01 – 2024-03-31
• Keywords: トラッキング / 蓄光 / 動的マーカー / 高速撮像 / サーモカメラ / ガルバノミラー

Outline of Final Research Achievements

Conventional markers are based on the assumption of feature values and prior dye application, and the tracking target and conditions are restricted. In this study, we developed a high-precision and high-speed dynamic phosphorescent marker that utilizes the phosphorescence phenomenon that occurs when irradiated with ultraviolet light as a method to dynamically generate a marker even when there are no feature points on the object. In addition to the development of related optical-axis control technology, we also succeeded in tracking a stuffed sparrow and visualizing powder trajectories, establishing a minimally invasive and low-cost real-time tracking method without prior preparation for marker use. Furthermore, we developed a dynamic thermal marker using laser heating and a thermo-camera, which can generate up to 33 markers simultaneously and can also generate markers with arbitrary shapes and information coded on them.

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Free Research Field

計測工学

Academic Significance and Societal Importance of the Research Achievements

本手法は対象に紫外線光を照射することで生じる蓄光現象を用い，高速ビジョン・高速トラッキングを用いてミリ秒単位のトラッキングを可能にした全く新しい技術であり，学術的独自性が高い．また，有機物に活用可能なことから，幅広い分野での利用が見込まれる．更に，本トラッキング手法が蓄光だけでなく，熱にも利用可能であることを確認したため，応用可能性が広がった．これまでのマーカー取付の事前準備や特徴点を必要とした課題を解決しただけでなく，高速イメージングを活用することで，ミリ秒単位のマーカーを任意に生成することが可能になり，様々な分野で応用される基盤的な光学トラッキング技術だと考えられる．