# Symmetric Nearest Neighbor

## 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

## Activating the Filter

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

## Options

Symmetric Nearest neighbor filter options

Presets, Input Type, Clipping, Blending Options, Preview, Split view
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.

## Example

Left: original. Right: filter applied.

Filters Enhance Symmetric Nearest Neighbor
Symmetric Nearest Neighbor