4.7. Symmetric Nearest Neighbor

4.7.1. Wirkungsweise

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. Filteraufruf

You can find this filter through FiltersEnhanceSymmetric Nearest Neighbor….

4.7.3. Eigenschaften

Abbildung 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 Abschnitt 2, „Gemeinsame Funktionsmerkmale“.

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

The result of this filter can be larger than the original image. With the default Adjust option, the layer will be automatically resized as necessary when the filter is applied. With the Clip option the result will be clipped to the layer boundary.

4.7.4. Beispiel

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