1 / 16

Vizualizácia

Ivan Šeďo. Vizualizácia. Why do we need such thing?. Games, Appearance industry, ... BRDF – function of dimension 6+ BRDF as rectangular data mapped to sphere. Čo je zlé?. Mapa 256 x 256 x 8bitov pre každý z 20,000 vrcholov objektu dáva 1256MB

mateo
Download Presentation

Vizualizácia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ivan Šeďo Vizualizácia

  2. Why do we need such thing? • Games, Appearance industry, ... • BRDF – function of dimension 6+ • BRDF as rectangular data mapped to sphere

  3. Čo je zlé? • Mapa 256 x 256 x 8bitov pre každý z 20,000 vrcholov objektu dáva 1256MB • No a to je veľa dát pre prenos alebo spracovanie v reálnom čase

  4. Spherical harmonics (SH) • Lineárna báza • Integrovanie svetla sa zmení na skalárny súčin • Rotácia

  5. SH – pre a proti • Rotačná invariancia • BRDF definovaná na polguli, SH na guli • Kvadratický počet koeficientov

  6. SH – iné typy

  7. Xinguo Liu et al. All-Frequency Precomputed Radiance Transfer for Glossy Objects

  8. Základné info • Svetlo ako kubická mapa • Faktorizácia lesklých BRDF na pohľadovo závislú a nezávislú funkciu • Haarova vlnková báza • CPCA (Clustered Principal Component Analysis)

  9. Paul Green at el. View-dependent precomputed light transport using nonlinear gaussian function approximations

  10. Základné info • Cieľ – len pohľadovo závislé dáta • Nelineárna báza

  11. Princíp

  12. Ďakujem za pozornosť

More Related