Imagick::blackThresholdImage

(PECL imagick 2.0.0)

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

Beschreibung

Imagick::blackThresholdImage ( mixed $threshold ) : bool

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

Parameter-Liste

threshold: The threshold below which everything turns black

Rückgabewerte

Liefert TRUE bei Erfolg.

Changelog

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

Beispiele

Beispiel #1 Imagick::blackThresholdImage()


<?php
function blackThresholdImage($imagePath, $thresholdColor) {
    $imagick = new \Imagick(realpath($imagePath));
    $imagick->blackthresholdimage($thresholdColor);
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>