4.7. Symmetric Nearest Neighbor

4.7.1. Overview

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

This filter is found in the main menu under FiltersEnhanceSymmetric Nearest Neighbor….

4.7.3. Options

Obrázek 17.42. Symmetric Nearest neighbor filter options

„Symmetric Nearest neighbor“ filter options

Presets, Input Type, Clipping, Blending Options, Preview, Split view
[Poznámka] Poznámka

These options are described in 2 – „Common Features“.


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


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

4.7.4. Příklad

Left: original. Right: filter applied.