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Tomokazu Ishikawa

    Department of Information Networking for Innovation and Design　Associate Professor
    Course of　Information Networking for Innovation and Design　Associate Professor
    Information Networking for Innovation and Design collaboration Hub for University and Business　Researcher
Last Updated :2025/04/25

Researcher Information

Research funding number

  • 30635545

ORCID ID

J-Global ID

Research Areas

  • Informatics / High-performance computing / Computer graphics
  • Informatics / Entertainment and game informatics

Published Papers

MISC

Research Grants & Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
    Date (from‐to) : 2021/04 -2024/03 
    Author : 石川 知一
     
    本研究は，コンピュータグラフィックス分野の研究として，電磁流体のシミュレーションを行うことを目的としている。近年の宇宙物理学の知見から，電磁流体に起因する天体現象の映像化を行う場合に，プラズマ粒子の運動を捉えるスケール（以下，ミクロ）と，観測できるレベルの流体的振る舞い（以下，マクロ）を同時に計算に含むことが映像にリアリティを与えると考えられる。一般にプラズマ流体の数値計算法は大規模計算機環境の利用が必要になるが，現象の解析が目的で映像化のためにはモデルを適切に変更する必要がある。そこで本研究では，CG分野で広く用いられる階層型シミュレーションを取り入れ，ミクロな事象が映像というマクロなシーンに与える影響を考慮したリアルな映像を，商用利用可能な時間内で作成することを目的とする。また，観測手法をレンダリング計算に含めることで，提案法をレンダリングするだけでなく，同じ物理量を使用する宇宙物理学にも可視化の面で貢献する。 今年度は特に太陽のプロミネンスを再現するための電磁流体シミュレーションを開発することを目標としており，開発の目処は立っているが成果物の発表には至っていない。また，マクロシミュレーションからミクロな事象を検出するために機械学習の方法を用いることを検討しており，その実験を追加で行い得られた知見を報告した。その他，映像表現をVRやMRのコンテンツとして提供するための開発の過程でいくつかの研究発表を行っている。
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Early-Career Scientists
    Date (from‐to) : 2018/04 -2021/03 
    Author : Ishikawa Tomokazu
     
    The purpose of this study was to output CG animations suitable for sound sources. We implemented a tool to digitally reproduce the work that is currently done in analog when creating a specific animation, and conducted an experiment to confirm the necessary parameters by having the user actually use our tool. In another scene, we confirmed whether it was possible to create a middle segment as specified by a key frame by optimizing the initial parameters. A questionnaire survey was conducted to find out whether it is possible to associate the features obtained from the video with the features of the music obtained from the background music and these impression words, and to find out the combination of video and background music that people find optimal. Using this data, we proposed a system to search for suitable background music for video.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
    Date (from‐to) : 2013/04 -2015/03 
    Author : ISHIKAWA Tomokazu
     
    We proposed a new modeling method to simulate complicated deformations of aurora for CG animations. Although much research work has been done in order to reproduce the aurora phenomenon using 3D computer graphics, no one has recreated disconnection and reconnection of aurora, which are dynamic behaviors unique to aurora. In our method, the aurora distributions are represented as sampling points. The proposed method renders the CG animations of the aurora by projecting 3D aurora distribution to the screen and calculating the intensities of emissions. Next, we propose a method for simulating glazed frost by computing heat transfers between water droplets and the surrounding air. We propose a method to create an animation of glazed frost formation by taking into account the heat transfer between particles and the outside grids. We propose a technique which is highly compatible for a FLIP method to solve the heat conduction equation and we reproduce the formation of glazed frost.

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