4.7. Symmetric Nearest Neighbor
| 4. Фильтры усиления |

### 4.7. Symmetric Nearest Neighbor

#### 4.7.1. Общая информация

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. Активация фильтра

You can find this filter through Filters → Enhance → Symmetric Nearest Neighbor….

#### 4.7.3. Параметры

Рисунок 17.35. «Symmetric Nearest neighbor» filter options

Presets, Preview, Split view

  These options are common to GEGL-based filters. Please refer to Раздел 2, «Common Features».

Радиус

  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.

#### 4.7.4. Пример

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

4.6. Удаление эффекта красных глаз |  | 4.8. Sharpen (Unsharp Mask)

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