When displaying a salt and peppered raster I get the best results removing them when I choose Layer Properties-Display-Resample During Display Using-MAJORITY FILTER (for discrete data). I have tried inputting parameters, using the spatial analyst-generalization-majority filter, but none match simply those used by default in the display.
Does anyone know the default algorithm being used by ArcGIS when displaying using the majority filter so I can process the raster using the same algorithm?
They tend not to specify their algorithms. If there is published literature cited in the help files link, then pursue it. alternately you could try to contact someone on the spatial analyst team