Presented at 1997 ACM-SIGGRAPH Symposium on Interactive 3D Graphics.
Efficient Radiosity Rendering using Textures and Bicubic Reconstruction
One of the models we have used to test the Radiosity As Textures (RAT) approach is available on-line.
The technical report and images below are also related with RAT.
UNC-CH Technical Report TR96-025.
Efficient Rendering of Radiosity using Textures and Higher Order Reconstruction
Figure 3: Image generated using PixelFlow simulator.
Figure 4: (a) reference image (513x513 radiosity samples). (b) information
from a depth 2 quadtree (5x5 samples). (c) bilinear reconstruction (resampled
to 256x256). (d) bicubic reconstruction (resampled to 256x256).
Figure 5: (a) information from a depth 2 quadtree (5x5 samples). (b) first
phase bicubic reconstruction (resampled to 8x8). (c) hadware bilinear shading
(256x256). (d) hardware bicubic shading (256x256).
Figure 7: Grotto model: left=original model with 402 quadrilaterals;
middle=RAT; right=adaptive subdivision (150,000 triangles).
Improved Sampling and Reconstruction in Radiosity,
In Simpósio Brasileiro de Computação Gráfica e Processamento de Imagens (SIBGRAPI'94),
Curitiba, Brazil, 1994.
LEFT: original mesh (37 vertices) and bilinear reconstruction.
Artifacts: shadow + Mach bands on the wall.
MIDDLE: a posteriori subdivision (max=4 quadtree levels) (1375 vertices) and bilinear reconstruction.
Shadow: no umbra-penumbra distinction; Mach bands: ok for this distance.
RIGHT: a priori subdivision (149 vertices) and bicubic reconstruction.
Shadow: OK; Mach bands: OK.
Reconstruction of Illumination Functions using Bicubic Hermite Interpolation,
In Fourth Workshop on Rendering (Eurographics),
Paris, France, July 1993.
LEFT: reference solution - model with 14080 quadrilaterals. OUR GOAL.
MIDDLE: bilinear interpolation - model with 136 quadrilaterals. MACH BANDS.
RIGHT: bicubic interpolation - model with 136 quadrilaterals. SMOOTH!