MIP-Map Level Selection for Texture Mapping

  • Authors:
  • Jon P. Ewins;Marcus D. Waller;Martin White;Paul F. Lister

  • Affiliations:
  • -;-;-;-

  • Venue:
  • IEEE Transactions on Visualization and Computer Graphics
  • Year:
  • 1998

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Abstract

Texture mapping is a fundamental feature of computer graphics image generation. In current PC-based acceleration hardware, MIP-mapping with bilinear and trilinear filtering is a commonly used filtering technique for reducing spatial aliasing artifacts. The effectiveness of this technique in reducing image aliasing at the expense of blurring is dependent upon the MIP-map level selection and the associated calculation of screen-space to texture-space pixel scaling. This paper describes an investigation of practical methods for per-pixel and per-primitive level of detail calculation. This investigation was carried out as part of the design work for a screen-space rasterization ASIC. The implementations of several algorithms of comparable visual quality are discussed and a comparison is provided in terms of per-primitive and per-pixel computational costs.