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

You can find this filter through FiltersEnhanceSymmetric Nearest Neighbor….

4.7.3. Options

Fig. 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 Secțiune 2, „Caracteristici obișnuite”.

Radius

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

Rezultatul acestui filtru poate fi mai mare decât imaginea originală. Cu opțiunea implicită Ajustează, stratul va fi automat redimensionat după cum este necesar când filtrul este aplicat. Cu opțiunea Taie rezultatul va fi tăiat la limita stratului.

4.7.4. Example

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