(PECL imagick 2, PECL imagick 3)
Imagick::posterizeImage — Reduces the image to a limited number of color level
$levels
, bool $dither
): boolReduces the image to a limited number of color level.
levels
dither
Returns true
on success.
Example #1 Imagick::posterizeImage()
<?phpfunction posterizeImage($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_RIEMERSMA, 8);?>