The fuzz is just working well in a range of 0 to 65535.
I suggest you to try to move fuzz on a color spectrum image.
1/ Get a color spectrum ( Google Image has a lot )
2/ Try this code :
<?php
function fuzzTest($source, $target, $fuzz) {
// Loads image
$im = new Imagick($source);
// Resizes images to make them easily comparable
$im->resizeImage(320, 240, Imagick::FILTER_LANCZOS, 1, true);
// Apply fuzz
$im->paintTransparentImage($im->getImagePixelColor(0, 0), 0, $fuzz);
// Writes image
$im->setImageFormat('png');
$im->writeImage($target);
$im->destroy();
return true;
}
for ($i = 0; ($i <= 10); $i++) {
fuzzTest('spectrum.png', "test_{$i}.png", (6553.5 * $i));
echo '<img src="test_' . $i . '.png" /> ';
}
?>
Imagick::paintTransparentImage
(PECL imagick 2.0.0)
Imagick::paintTransparentImage — Remplit les pixels avec une couleur
Description
Change les pixels qui correspondent à une couleur en une couleur de remplissage.
Liste de paramètres
-
target -
La couleur cible, avec son opacité.
-
alpha -
Le niveau de transparence : 1.0 est totalement opaque, et 0 est totalement transparent.
-
fuzz -
Ce paramètre indique la tolérance qui permet de considérer que deux couleurs sont identiques.
Valeurs de retour
Returns TRUE on success.
Erreurs / Exceptions
Lance une exception ImagickException si une erreur survient.
Historique
| Version | Description |
|---|---|
| 2.1.0 | Permet désormais l'utilisation d'une chaîne pour représenter la couleur. Les versions précédentes ne permettaient que les objets ImagickPixel. |
alain at ocarina dot fr
17-Oct-2011 08:14
Anonymous
06-Mar-2009 01:11
Actually it does seem to work just not the way expected perhaps.
Looking at the fuzz option on ImageMagick's site (http://www.imagemagick.org/script/command-line-options.php#fuzz), "The distance can be in absolute intensity units or, by appending % as a percentage of the maximum possible intensity (255, 65535, or 4294967295)."
As it requires a float, the percentage value won't work so it actually one of the max intensity values. In my case, the images I was working with seemed to have max intensity values of 65535. So a fuzz of 6500, for roughly 10%, seemed to do the trick.
The part that might be problematic though is how do you determine the max intensity of a color/image? Using a static 6500 would be fine until I would have to convert an image with a max intensity other than 65535. If it's 255 it would wipe the entire image. Or fall far short on the fuzz with the larger value.
paziek at gmail dot com
12-Feb-2009 11:53
Fuzz attribute doesn't work here.
#!/usr/bin/php
<?php
if(!isset($argv[1])) die("input file\n");
$im = new Imagick( $argv[1] );
$im->paintTransparentImage('rgb(246,241,230)', 0.0, 10);
file_put_contents('transparent_'.$argv[1], $im);
?>
Will "remove" only colors that match exactly rgb(246,241,230)
