4.7. Symmetric Nearest Neighbor

4.7.1. Översikt

This filter blurs the image preserving edges. It is very effective in noise reduction maintaining sharp edges.

It works comparing each pixel to its neighboring pixels and to 1 or 2 pairs of symmetric pixels around the center.

4 symmetric pairs

4.7.2. Activating the filter

You can find this filter through FiltersEnhanceSymmetric Nearest Neighbor….

4.7.3. Alternativ

Figur 17.37. Symmetric Nearest neighbor filter options

”Symmetric Nearest neighbor” filter options

Presets, Preview, Split view

These options are common to GEGL-based filters. Please refer to Avsnitt 2, ”Gemensamma funktioner”.

Radie

Radius, in pixels, of square pixel region. Width and height of this region are radius*2+1:

Pairs

You can select 1 or 2 pairs : higher number preserves more acute features.

Clipping

Resultatet av detta filer kan vara större än originalbilden. Med alternativet Justera kommer lagret automatiskt att ändra storlek som nödvändigt när filtret tillämpas. Med alternativet Klipp kommer resultatet att klippas till lagergränsen.

4.7.4. Exempel

Left: original..............Right: filter applied