Imagick::posterizeImage

(PECL imagick 2.0.0)

Imagick::posterizeImageReduces the image to a limited number of color level

Beschreibung

bool Imagick::posterizeImage ( int $levels , bool $dither )

Reduces the image to a limited number of color level.

Parameter-Liste

levels

dither

R├╝ckgabewerte

Liefert TRUE bei Erfolg.

Beispiele

Beispiel #1 Imagick::posterizeImage()

<?php
function posterizeImage($imagePath$posterizeType$numberLevels) {
    
$imagick = new \Imagick(realpath($imagePath));
    
$imagick->posterizeImage($numberLevels$posterizeType);
    
$imagick->setImageFormat('png');
    
header("Content-Type: image/png");
    echo 
$imagick->getImageBlob();
}

posterizeImage($imagePath, \Imagick::DITHERMETHOD_RIEMERSMA8);

?>

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linspb at gmail dot com
4 months ago
At PHP 7.x before

$im->posterizeimage(2, FALSE);

do

$im->setImageType(imagick::IMGTYPE_COLORSEPARATION);

on PHP 5.x working without setImageType well.

Example:
$im = new Imagick();
$r = $im->readImageBlob($label);
if (!$r) {
    return FALSE;
}
$im->setImageType(imagick::IMGTYPE_COLORSEPARATION);
$im->posterizeimage(2, 0);
$bmp = $im->getImageBlob();
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