In computer graphics, texture filtering or texture smoothing is the method used to determine the texture color for a texture mapped pixel, using the colors of nearby texels (pixels of the texture). Mathematically, texture filtering is a type of anti-aliasing, but it filters out high frequencies from the texture fill whereas other AA techniques generally focus on visual edges. Put simply, it allows a texture to be applied at many different shapes, sizes and angles while minimizing blurriness, shimmering and blocking.
There are many methods of texture filtering, which make different trade-offs between computational complexity and image quality.
Read more about Texture Filtering: The Need For Filtering, Mipmapping, Filtering Methods
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