4.7. Symmetric Nearest Neighbor

Figura 17.46. Example for the “Symmetric Nearest Neighbor” filter

Left: original image. Right: filter applied.

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

This filter is found in the main menu under Filters → Enhance → Symmetric Nearest Neighbor….

Figura 17.47. “Symmetric Nearest neighbor” filter options

Presets, “Input Type”, Clipping, Blending Options, Previsão, Merge filter, Split view

	Nota
	These options are described in Seção 2, “Common Features”.

Raio

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.