Please not that I had extremely high CPU usage using this function on Ubuntu linux 15.10. Switching to the resizeImage function fixed the problem.
Imagick::resampleImage
(PECL imagick 2, PECL imagick 3)
Imagick::resampleImage — Resample image to desired resolution
Descrierea
public Imagick::resampleImage
( float
$x_resolution
, float $y_resolution
, int $filter
, float $blur
) : boolResample image to desired resolution.
Parametri
-
x_resolution -
-
y_resolution -
-
filter -
-
blur -
Valorile întoarse
Întoarce true în caz de succes.
Exemple
Example #1 Imagick::resampleImage()
<?php
function resampleImage($imagePath) {
$imagick = new \Imagick(realpath($imagePath));
$imagick->resampleImage(200, 200, \Imagick::FILTER_LANCZOS, 1);
header("Content-Type: image/jpg");
echo $imagick->getImageBlob();
}
?>
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User Contributed Notes 3 notes
simon ¶
8 years ago
bleighty at dvidshub dot net ¶
10 years ago
Please note that blur of 1 should not affect the image if I'm understanding correctly from this page:
http://www.php.net/manual/en/imagick.resizeimage.php
anagai at yahoo dot com ¶
12 years ago
Lets say you want to reduce the resolution of uploaded images for the web.
The following will load a image at whatever resolution and resample it down to 72 dpi and save as a different file.
The dpi for setImageResolution() and resampleImage() should be whatever dpi your resampling too.
<?php
$image = new Imagick();
$image->readImage('image.jpg');
$image->setImageResolution(72,72);
$image->resampleImage(72,72,imagick::FILTER_UNDEFINED,0);
$image->writeImage('image72.jpg');
?>
