Geometrisk Afledt Billed-Basered Lyssætning: Implementering og validering

Geometrically Derived Image Based Lighting: Implementation and validation

Vestergaard, Kasper

4. term (INF10 - Master Thesis)

Informatics, Master

2008

57

This is the second of two reports and presents a method called Geometrically Derived Image Based Lighting (GDIBL). The goal is to reconstruct how lighting changes across a scene so computer-generated objects can be rendered with illumination that matches their surroundings. GDIBL does this by using multiple light probes—images or measurements that capture incoming light at different locations—and linking them to a rough geometric representation of the scene (a simple 3D model). The geometry guides which probes influence each point, producing spatially varying illumination. We implemented the method and demonstrated its effect in a synthetically rendered scene, supporting its validity.

Dette er den anden af to rapporter og præsenterer metoden Geometrically Derived Image Based Lighting (GDIBL). Formålet er at genskabe, hvordan lyset varierer fra sted til sted i en scene, så computergenererede objekter kan gengives med belysning, der passer til omgivelserne. GDIBL gør dette ved at bruge flere lysprober – billeder eller målinger, der opfanger indkommende lys forskellige steder – koblet til en grov geometrisk repræsentation af scenen (en enkel 3D-model). Geometrien styrer, hvilke prober der påvirker hvert punkt, så belysningen kan variere i rummet. Metoden blev implementeret og demonstreret på en syntetisk renderet scene, hvilket underbygger dens virkning.

[This apstract has been rewritten with the help of AI based on the project's original abstract]

graphics ; image based lighting ; illumination ; spatial ; light ; light probe ; hdr ; high dynamic range ; grafik ; billedbaseret lyssætning ; belysning ; rumlig ; lys ; lys optagelse

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