Topic
Fragment processing
About: Fragment processing is a research topic. Over the lifetime, 248 publications have been published within this topic receiving 6155 citations.
Papers published on a yearly basis
Papers
22 Oct 2003
TL;DR: This paper describes volume ray-casting on programmable graphics hardware as an alternative to object-order approaches, and exploits the early z-test to terminate fragment processing once sufficient opacity has been accumulated, and to skip empty space along the rays of sight.
Abstract: Nowadays, direct volume rendering via 3D textures has positioned itself as an efficient tool for the display and visual analysis of volumetric scalar fields. It is commonly accepted, that for reasonably sized data sets appropriate quality at interactive rates can be achieved by means of this technique. However, despite these benefits one important issue has received little attention throughout the ongoing discussion of texture based volume rendering: the integration of acceleration techniques to reduce per-fragment operations. In this paper, we address the integration of early ray termination and empty-space skipping into texture based volume rendering on graphical processing units (GPU). Therefore, we describe volume ray-casting on programmable graphics hardware as an alternative to object-order approaches. We exploit the early z-test to terminate fragment processing once sufficient opacity has been accumulated, and to skip empty space along the rays of sight. We demonstrate performance gains up to a factor of 3 for typical renditions of volumetric data sets on the ATI 9700 graphics card.
938 citations
1 Aug 2001
TL;DR: WireGL provides the familiar OpenGL API to each node in a cluster, virtualizing multiple graphics accelerators into a sort-first parallel renderer with a parallel interface, which can drive a variety of output devices, from standalone displays to tiled display walls.
Abstract: We describe WireGL, a system for scalable interactive rendering on a cluster of workstations. WireGL provides the familiar OpenGL API to each node in a cluster, virtualizing multiple graphics accelerators into a sort-first parallel renderer with a parallel interface. We also describe techniques for reassembling an output image from a set of tiles distributed over a cluster. Using flexible display management, WireGL can drive a variety of output devices, from standalone displays to tiled display walls. By combining the power of virtual graphics, the familiarity and ordered semantics of OpenGL, and the scalability of clusters, we are able to create time-varying visualizations that sustain rendering performance over 70,000,000 triangles per second at interactive refresh rates using 16 compute nodes and 16 rendering nodes.
370 citations
1 Aug 2000
TL;DR: This paper proposes new rendering techniques that significantly improve both performance and image quality of the 2D-texture based approach and demonstrates how multi-stage rasterization hardware can be used to efficiently render shaded isosurfaces and to compute diffuse illumination for semi-transparent volume rendering at interactive frame rates.
Abstract: Interactive direct volume rendering has yet been restricted to high-end graphics workstations and special-purpose hardware, due to the large amount of trilinear interpolations, that are necessary to obtain high image quality. Implementations that use the 2D-texture capabilities of standard PC hardware, usually render object-aligned slices in order to substitute trilinear by bilinear interpolation. However the resulting images often contain visual artifacts caused by the lack of spatial interpolation. In this paper we propose new rendering techniques that significantly improve both performance and image quality of the 2D-texture based approach. We will show how in ulti-texturing capabilitiesof modern consumer PC graphboards are exploited to enable in teractive high quality volume visualization on low-cost hardware. Furthermore we demonstrate how multi-stage rasterization hardware can be used to efficiently render shaded isosurfaces and to compute diffuse illumination for semi-transparent volume rendering at interactive frame rates.
355 citations
1 Jan 2003
322 citations
1 Aug 1996
TL;DR: A simple method for rendering directly from compressed textures in hardware and software rendering systems, with minimal loss in visual quality and a small impact on rendering time is presented.
Abstract: We present a simple method for rendering directly from compressed textures in hardware and software rendering systems. Textures are compressed using a vector quantization (VQ) method. The advantage of VQ over other compression techniques is that textures can be decompressed quickly during rendering. The drawback of using lossy compression schemes such as VQ for textures is that such methods introduce errors into the textures. We discuss techniques for controlling these losses. We also describe an extension to the basic VQ technique for compressing mipmaps. We have observed compression rates of up to 35 : 1, with minimal loss in visual quality and a small impact on rendering time. The simplicity of our technique lends itself to an efficient hardware implementation. CR categories: I.3.7 [Computer Graphics]: 3D Graphics and Realism Texture; I.4.2 [Image Processing]: Compression Coding
238 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 5 |
| 2019 | 3 |
| 2018 | 5 |
| 2017 | 3 |
| 2016 | 9 |