Generic filters are a catch-all for filters which can't be placed elsewhere.
This category describes the following filters:
Paragraaf 9.2, “Convolution Matrix”
Paragraaf 9.3, “Distance Map”
Paragraaf 9.4, “Normal Map”
Paragraaf 9.5, “Dilate”
Paragraaf 9.6, “Erode”
Paragraaf 9.7, “GEGL Graph”
