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MIP-map level selection for texture mapping

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4 Author(s)
Ewins, J.P. ; Centre for VLSI, Sussex Univ., Brighton, UK ; Waller, M.D. ; White, M. ; Lister, P.F.

Texture mapping is a fundamental feature of computer graphics image generation. In current PC-based acceleration hardware, MIP (“multum in parvo”) 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

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Visualization and Computer Graphics, IEEE Transactions on  (Volume:4 ,  Issue: 4 )