2022 Fiscal Year Final Research Report
Elucidation of human visual characteristics in HDR (High Dynamic Range) environments and its engineering applications
| Project/Area Number |
20K11920
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 61020:Human interface and interaction-related
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| Research Institution | International College of Technology, Kanazawa (2021-2022)
Kagoshima University (2020) |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 概日リズム / HDR / ハイダイナミックレンジ / 階調圧縮 / 大局的処理 / グローバルトーンマッピング / 網膜 / 視覚野 |
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| Outline of Final Research Achievements |
In recent years, electronic displays have been used extensively in outdoor high dynamic range (HDR) environments due to the explosive spread of mobile devices. Therefore, it is necessary to elucidate the previously unexplored characteristics of human tone perception in such environments, and to apply this knowledge to engineering, keeping in mind the diversity of usage environments and differences in the individual characteristics of users.
A hypothesis that human visual system compress a large amount of information in HDR environments in a global and adaptive manner in the retina, etc. (abbreviated as NVP: Normalized Visual Percept) first, and then perform local processing through the visual cortex in brain, is proposed and tested. Experimental results suggest that (1) the hypothesis is generally valid and (2) the essential cause of variation in NVP is not optical factors such as weather or location but is human factors due to individual circadian rhythms.
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| Free Research Field |
視覚とヒューマンインタフェース
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| Academic Significance and Societal Importance of the Research Achievements |
学術的意義としては、従来、生理学的分野の定説では、晴天屋外の照明環境の変化が「個人の概日リズムに与える『知覚できない』照度効果」とされてきた。しかし、その定説を覆し、知覚可能な視覚特性の変化であることを明らかにした。これは、幅広い分野で革新的なの研究を創出する可能性を示唆する。
社会的意義としては、様々な工学的応用が考えられる。例えば、HDR用コンテンツの屋外での視聴はもとより、工業用監視カメラの分野においても、入力系のカメラのみをHDR対応に変更することで、監視の効率や正確性が格段に向上すると期待される。さらに、コロナ禍下で普及した国際遠隔会議等での視覚的な時差調整への応用も期待される。
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