Imagick::uniqueImageColors
(PECL imagick 2,PECL imagick 3)
Imagick::uniqueImageColors — Discards all but one of any pixel color
Description
public Imagick::uniqueImageColors ( ) : bool
Discards all but one of any pixel color. This method is available if Imagick has been compiled against ImageMagick version 6.2.9 or newer.
Return Values
Returns true on success.
Examples
Example #1 Imagick::uniqueImageColors()
<?php
function uniqueImageColors($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
//Reduce the image to 256 colours nicely.
$imagick->quantizeImage(256, \Imagick::COLORSPACE_YIQ, 0, false, false);
$imagick->uniqueImageColors();
$imagick->scaleimage($imagick->getImageWidth(), $imagick->getImageHeight() * 20);
header("Content-Type: image/png");
echo $imagick->getImageBlob();
}
?>
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/imagick.uniqueimagecolors.php