Imagick
PHP Manual

Imagick::blackThresholdImage

(PECL imagick 2.0.0)

Imagick::blackThresholdImageForces all pixels below the threshold into black

Descrierea

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.

Parametri

threshold

The threshold below which everything turns black

Valorile întoarse

Întoarce TRUE în caz de succes.

Istoricul schimbărilor

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

Exemple

Example #1 Imagick::blackThresholdImage()

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

?>


Imagick
PHP Manual