Imagick
PHP Manual

Imagick::blackThresholdImage

(PECL imagick 2.0.0)

Imagick::blackThresholdImage — Forces all pixels below the threshold into black

Descrizione

bool Imagick::blackThresholdImage ( mixed $threshold )

Is like Imagick::thresholdImage() but forces all pixels below the threshold into black while leaving all pixels above the threshold unchanged.

Elenco dei parametri

threshold

The threshold below which everything turns black

Valori restituiti

Restituisce TRUE in caso di successo.

Log delle modifiche

Versione Descrizione
2.1.0 Now allows a string representing the color as a parameter. Previous versions allow only an ImagickPixel object.

Imagick
PHP Manual