8.61. Local Threshold

8.61.1. Activa l'ordre

You can access this command from the main menu through Colors → Local Threshold….

8.61.2. Opcions

Figura 16.233. «Local Threshold» filter options

Predefinits, Tipus d'entrada, Retallat, Opcions de barreja, Previsualitza, Combina el filtre, Vista dividida

	Nota
	These options are described in Secció 8.1.2, «Característiques comunes dels colors».

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.