4.7. Symmetric Nearest Neighbor

4.7.1. 概観

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. フィルターの呼び出し方

You can find this filter through FiltersEnhanceSymmetric Nearest Neighbor….

4.7.3. オプション

図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 「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.


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. 例

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