A simple GEGL filter to reduce noise.
You can find this filter through Filters → Enhance → Noise Reduction….
Abbildung 17.40. Eigenschaften für das Filter »Deinterlace«
These options are described in Abschnitt 2, „Gemeinsame Funktionsmerkmale“.
Increasing Strength lessens noise, and increases blur: find compromise using the on-canvas preview.
Original
Filter applied. Strength = 5