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Full Spectral Rendering

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers. →
Avatar for yumcyawiz yumcyawiz
July 14, 2018
Programming
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130

Full Spectral Rendering

LT会のスライド

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yumcyawiz

July 14, 2018
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Transcript

  1. FULL SPECTRUM RENDERING @yumcyawiz

  2. FULL SPECTRUM RENDERINGとは？ • RGBではなく全波長でレンダリングを行う方法 • 物理的により正確になる • 光の分散を再現できる

  3. 光の分散(Dispersion)

  4. レンダリング方程式の拡張 , , = , , + න Ω ,

    , , , , cos 波長を考慮したLTE

  5. 計算方法 , , ランダムに波長を選択 画素に入射するスペクトル放射輝度を計算

  6. 波長からRGBへの変換 スペクトル放射輝度 XYZ表色系 RGB表色系

  7. 波長からXYZ表色系への変換 = න 380 780 ҧ = න 380 780

    ത = න 380 780 ҧ 等色関数

  8. XYZ表色系からRGB表色系への変換 = 2.3655 −0.8971 −0.4683 −0.5151 1.4264 0.0887 0.0052 0.0144

    1.0089

  9. ガラスの波長ごとの屈折率 2 − 1 = 2 2 − 0 セルマイヤーの分散公式

  10. SCHOTT社のBK7ガラス

  11. レンダリング結果(10000サンプル)

  12. 光の分散がちゃんと出て嬉しい！！！

  13. ご清聴ありがとうございました