Trilinear filtering

Trilinear filtering or trilinear interpolation is an isotropic interpolation, which comes as a texture filter when rendering 3D computer graphics are used. The trilinear filtering is an extension of the bilinear filtering with the aim to suppress the effect of MIP- banding. Their use is therefore only useful together with MIP- mapping.

MIP- banding is a discontinuity, the (level of detail ) is created by bilinear filtered textures at the transition between two MIP levels. It is clearly seen as a line, in which the degree of sharpness of the texture change abruptly.

To avoid this effect, trilinear filtering always two texture values ​​arise from interpolation of adjacent MIP levels, computed and then interpolated linearly. The necessary three-stage linear interpolation is trilinear interpolation her name.

• Image synthesis