Hierarchical Reconstruction of Quadtree-Based Approximations of Incident Radiance
Ladda ner
Typ
Examensarbete för masterexamen
Master's Thesis
Master's Thesis
Program
High-performance computer systems (MPHPC), MSc
Publicerad
2023
Författare
Nilsson, Johannes
Modellbyggare
Tidskriftstitel
ISSN
Volymtitel
Utgivare
Sammanfattning
This thesis presents a method of hierarchically reconstructing quadtree-based approximations of incident radiance for path guiding. To that end, Gaussian denoising is applied by mapping quadtree data to matrices, performing regular matrix convolutions, and then mapping the data back to the quadtree. The reconstructed guiding distributions are shown
to outperform previous work in most cases, especially when the number of path samples
is limited. Additionally, using a simple target distribution in the beginning of the learning
process before switching to the full version is shown to speed up the learning. To limit the
overhead of the reconstruction procedure, an automatic workload budgeting algorithm is
presented. While the improved quality of the guiding distributions seems promising, the
implemented reconstruction algorithm imposes a large enough overhead to nearly cancel
out the benefits.
Beskrivning
Ämne/nyckelord
Path , Tracing , Light , Transport , Guiding , Reconstruction , Denoising