8.61. Local Threshold

8.61.1. Attivazione del filtro

This filter is found in the main menu under ColorsLocal Threshold….

8.61.2. Opzioni

Figura 16.240. «Local Threshold» filter options

«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 anti-aliasing, or set to 1 to disable anti-aliasing.

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.

Opzioni di fusione, Anteprima, Merge filter, Dividi vista

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