r.neighbors
r.neighbors - Makes each cell category value a function of the category values assigned to the cells around it, and stores new cell values in an output raster map layer.
Raster (r.*)
ParameterRaster|input|Name of input raster map|False
ParameterSelection|method|Neighborhood operation|average;median;mode;minimum;maximum;stddev;sum;variance;diversity;interspersion
ParameterNumber|size|Neighborhood size|1.0|None|3
ParameterBoolean|-c|Use circular neighborhood|False
OutputRaster|output|Name for output raster map