A new microflake model with microscopic self-shadowing for accurate volume downsampling
Résumé
Naïve linear methods for downsampling high-resolution microflake volumes often produce inaccurate appearance, especially when input voxels are very opaque. Preserving correct appearance at all resolutions requires taking into account masking-shadowing effects that occur between and inside dense input voxels. We introduce a new microflake model whose additional parameters characterize self-shadowing effects at a microscopic scale. We provide an anisotropic self-shadowing function and microflake distributions for which the scattering coefficients and the phase functions of our model have closed-form expressions. We use this model in a new downsampling approach in which scattering parameters are computed from local estimations of self-shadowing probabilities in the input volume. Unlike previous work, our method handles datasets with spatially varying scattering parameters, semi-transparent volumes and datasets with intricate silhouettes. We show that our method generates LoDs with correct transparency and consistent appearance through scales for a wide range of challenging datasets, allowing for huge memory savings and efficient distant rendering without loss of quality.
Fichier principal
paper.pdf (13.72 Mo)
Télécharger le fichier
preview.jpg (676.23 Ko)
Télécharger le fichier
supplemental.pdf (537.87 Ko)
Télécharger le fichier
vignette.png (1.58 Mo)
Télécharger le fichier
codeAndData.zip (11.42 Mo)
Télécharger le fichier
slides_eg2018.pdf (2.45 Mo)
Télécharger le fichier
| Origine | Fichiers produits par l'(les) auteur(s) |
|---|
| Format | Figure, Image |
|---|
| Format | Figure, Image |
|---|
Loading...