Fourier Texture Filtering

Many of the best texture filtering techniques are unsuitable for modern shader based graphics hardware, either because of performance considerations or simply because they do not fit in with the way the hardware operates. Those that are compatible with modern hardware often suffer other shortcomings. This paper presents a new texture filtering technique; which aims to supply similar visual quality to the top techniques, with smaller source textures, in real-time and on current consumer level hardware. This new technique utilises Fourier space filtering to minimise aliasing in MIP maps, while adding back detail by re-introducing the more dominant frequencies when the texture is rendered.