| 4.7. Symmetric Nearest Neighbor | ||
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4. 增强滤镜 |  |
| 4.7. Symmetric Nearest Neighbor | ||
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4. 增强滤镜 | |
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
![[注意]](images/note.png)
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注意 |
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These options are described in 第 2 节 “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.
