I'm curious to know what is the counterpart for ArcGIS focal statistics tool in QGIS?
From QGIS Processing Toolbox, we can access GRASS
Available options (statistics) are slightly different each other.
Both ArcGIS Focal statistics / GRASS r.neighbors
- Mean (average)
- Majority (Mode)
(I cannot find Range in r.neighbors now -QGIS 2.18- for some unknown reason.)