Improved Silhouette Rendering and Detection of Splat-Based Models

  • Rafael Fernandes Ivo UFC
  • Creto A. Vidal UFC
  • Joaquim B. Cavalcante-Neto UFC


Surface splatting has proven to be a good approach to render point-based models. The technique keeps the simplicity of point based models with a high quality rendering due to local filtering between the samples. However, silhouettes and sharp features are noticed as high frequency variations on image-space. Thus, filtering cannot hide artifacts to appear next to these areas without an explicit approach, mainly on bad sampling conditions as low density of samples. In this paper, we present a new curved splat approach, called here quadric splat, which improves rendering of a model near silhouette and sharp features. These quadric splats may be placed on a surface using any sampling process applying our proposed error metric. We also propose a simple method to detect splats near silhouettes on object-space. This approach allows an efficient silhouette detection on GPUs. Our silhouette detection was applied on a surface splatting pipeline aiming to render quadric splats only where their effect is more noticed, but the technique is independent and can be applied even for non-realistic rendering of splat-based models.
Palavras-chave: Point-based rendering, Surface splatting, Silhouette.
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IVO, Rafael Fernandes; VIDAL, Creto A.; CAVALCANTE-NETO, Joaquim B.. Improved Silhouette Rendering and Detection of Splat-Based Models. In: CONFERENCE ON GRAPHICS, PATTERNS AND IMAGES (SIBGRAPI), 33. , 2020, Evento Online. Anais [...]. Porto Alegre: Sociedade Brasileira de Computação, 2020 . p. 391-402.