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Development of a Fast Method for Generating Computer Animation Using a Isophotic Morphing

Research Project

Project/Area Number 13680416
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 計算機科学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

KANEDA Kazufumi  Graduate School of Engineering, Assistant Professor, 大学院・工学研究科, 助教授 (30185946)

Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥2,600,000 (Direct Cost: ¥2,600,000)
KeywordsComputer Graphics / Rendering / Morphing / Illumination / Interreflection of Light / Isophotic Line / Computer Animation / Image Interpolation / 相互反射光
Research Abstract

This project has developed a fast method for generating photorealistic animations taking into account interreflection of light when changing light source positions. The developed method calculates illuminance distributions at several sampled light source positions taking into account interreflection of light in advance, and stores the distributions as isophotic lines. After specifying a new light source position, illuminance distributions at the light source position are interpolated by warping the isophotic lines. The novel approach can be interpolated illminance distributions that are nonlinear in regard to light source position, because the method uses a morphing technique to the position and shape of isophotic lines.
To improve the accuracy of the proposed illumination morphing method, the resultant images are compared with a traditional linear interpolation method, and a combination method of the illumination morphing and linear interpolation methods is developed. The combination method selects accurately interpolated areas from two illuminance distributions based on an evaluation function. The function uses distance between a light source position and a calculation point, an incident angle of light, and correspondence between isophotic lines. The usefulness of the proposed method is demonstrated in rendering an animation under interreflective environment.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 真鍋知久: "等照度線の変形による相互反射環境下における光源移動時の照度補間法"画像電子学会誌. 31・4. 487-495 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 金田和文: "線分近似した特徴曲線に基づく画像モーフィング"画像電子学会誌. 29・4. 320-329 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tomohisa Manabe, et al.: "A Method for Interpolating Illuminance Distribution due to In-between Light Source Position under Interreflective Environment Using Isophotic Line Warping (in Japanese)"The Journal of the Institute of Image Electronics Engineers of Japan. Vol.31, No.4. 487-495 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Kazufumi Kaneda, et al.: "Image Morphing Based on Feature Curves Approximated by Using Line Segments (in Japanese)"The Journal of the Institute of Image Electronics Engineers of Japan. Vol.29, No.4. 320-329 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 真鍋知久: "等照度線の変形による相互反射環境下における光源移動時の照度補間法"画像電子学会誌. 31・4. 487-495 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 大坪夕真: "画像モーフィングのための3次元幾何モデルを用いた形状および色の変化率制御手法"電気・情報関連学会中国支部第53回連合大会講演論文集. 471 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 柴林一郎: "イルミネーションモーフィング"Visual Computing・グラフィクスとCAD合同シンポジウム予稿集. 65-70 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 柴林一郎: "等照度線のモーフィングを用いた光源移動時の高速画像生成手法"電気・情報関連学会中国支部第51回連合大会講演論文集. 379 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 金田和文: "線分近似した特徴曲線に基づく画像モーフィング"画像電子学会誌. 29・4. 320-329 (2000)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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