8.61. Local Threshold
| 8. Il menu «Colori» |

### 8.61. Local Threshold

#### 8.61.1. Activating the Filter

This filter is found in the main menu under Colors → Local Threshold….

#### 8.61.2. Opzioni

Figura 16.239. «Local Threshold» filter options

Preimpostazioni

  «Presets» are a common feature for several Colors commands. You can find its description in Sezione 8.1.1, «Caratteristiche comuni dei colori».

Radius

  Standard deviation of gaussian neighborhood average for computing local contrast. If 0 is used a global threshold is used instead of one based on local contrast.

Antialiasing

  This sets a rough target of levels of accuracy for antialiasing, or set to 1 to disable antialiasing.

Threshold level

  Thresholding level consists of two values. Change the lower threshold towards 0 to minimize shadows or towards 1.0 to minimize highlights. The high threshold decides the maximum values to include, above this it gets set to 0.

Blending Options, Anteprima, Merge filter, Dividi vista

  These are common features described in Sezione 8.1.1, «Caratteristiche comuni dei colori».

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