4.9. Odstrani pege
| 4. Enhance Filters |

### 4.9. Odstrani pege

#### 4.9.1. Pregled

This filter is used to remove small defects due to dust, or scratches, on a scanned image, and also moiré effects on image scanned from a magazine. You should select isolated defects before applying this filter, in order to avoid unwanted changes in other areas of your image. The filter replaces each pixel with the median value of the pixels within the specified radius.

#### 4.9.2. Activating the Filter

This filter is found in the main menu under Filters → Enhance → Despeckle….

#### 4.9.3. Možnosti

Slika 17.46. “Despeckle” filter options

Predogled

  If checked, parameter setting results are interactively displayed in preview.

Median
  Prilagodljivo

    Adapts the radius to image or selection content by analyzing the histogram of the region around the target pixel. The adapted radius will always be equal to or smaller than the specified radius.

  Rekurzivno

    Repeats filter action which gets stronger.

Radij

  Sets size of action window from 1 (3×3 pixels) to 20 (41×41). This window moves over the image, and the color in it is smoothed, so imperfections are removed.

Raven črnine

  Only include pixels brighter than the set value in the histogram (-1-255).

Raven beline

  Only include pixels darker than the set value in the histogram (0-256).

4.8. Sharpen (Unsharp Mask) |  | 4.10. Filter NL

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