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7. The Menus / 7.7 The Filter Menu

### 7.7.9 Sharpen/Adaptive Sharpen

Adaptive Sharpen is not sharpening an image homogeneously but is only increasing contrasts higher than a given limit. In contrast to Unsharp Masking it uses all color channels for calculating the contrast and is not filtering channel by channel. Usually Adaptive Sharpen gives best results with a threshold around 10%.