4.7. Symmetric Nearest Neighbor

4.7.1. Resum

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. Activació del filtre

You can find this filter through FiltersEnhanceSymmetric Nearest Neighbor….

4.7.3. Opcions

Figura 17.35. 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 Secció 2, “Característiques comunes”.

Radi

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.

4.7.4. Exemple

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