Deferred blending: Image composition for single-pass point rendering

In this paper, we propose novel GPU accelerated algorithms for interactive point-based rendering (PBR) and high-quality shading of transparent point surfaces. By introducing the concept of deferred blending we are able to formulate the smooth point interpolation problem as an image compositing post-processing task. Consequently, our new PBR algorithm does not suffer from an extra visibilitysplatting pre-render pass, for conservative e–z-buffer visibility culling, as this is eventually performed together with the smooth point interpolation during image compositing. Moreover, this new deferred blending concept enables hardware accelerated transparent PBR with combined effects of multi-layer transparency, refraction, specular reflection, and per-fragment shading. Deferred blending is based on a separation of the point data into not self-overlapping minimal independent groups, a multi-target rendering pass and an image compositing post-processing stage. We present different grouping al...

• Type: Journal
• Year: 2007
• Where: CG
• Authors: Yanci Zhang, Renato Pajarola
• Keywords: CG 2007, Computer Graphics, Deferred Blending, Rendering Pass, Smooth Point Interpolation