This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Linear and Nonlinear Filters
Mathematica's highly optimized filtering capabilities provide a wide range of linear and modern nonlinear local filters, as well as a variety of nonlocal filters, which can be applied to arbitrary arrays of data and images.
Linear Filters
GaussianFilter Gaussian and Gaussian derivatives filtering of images and arrays
ListConvolve, ListCorrelate convolve, correlate with any kernel
Nonlinear Filters
DerivativeFilter general-order derivative filter
CellularAutomaton general cellular automaton
Nonlocal Filters