The following images show the effect of different filters on mipmap quality. The source image was a 128x128 TGA image. For each filter the 32x32 generated mipmap is shown. Differences are more apparent in a side by side comparison.
Bell, Blackman, Box, B-spline | ||||
Catmull-Rom, Gaussian, Kaiser, Lanczos3 | ||||
Lanczos4, Lanczos6, Lanczos12, Mitchell | ||||
Quadratic approximation, Quadratic interpolation, Quadratic mix, Tent |
For reference, the original image