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Texture filtering is a technique in the field of computer graphics where engineers utilize pixel maps to fill in a particular graphic area. It commonly uses something called “texels” – individual picture pixels in a larger texture map.
Texture filtering can be done in many different ways. Some techniques use algorithms like nearest neighbor, and others use linear or bilinear filtering, as well as isotropic or anisotropic filtering. Sophisticated algorithms look at a series of pixels to fill in the gaps or render graphics based on a probabilistic model.