Imagick::setImageCompression

(PECL imagick 2.0.0)

Imagick::setImageCompressionSets the image compression

Descrizione

Imagick::setImageCompression ( int $compression ) : bool

Elenco dei parametri

compression

One of the COMPRESSION constants

Valori restituiti

Restituisce TRUE in caso di successo.

Errori/Eccezioni

Lancia una ImagickException in caso di errore.

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User Contributed Notes 2 notes

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7
snipes2083 [at] yahoo com
9 years ago
Above it says "One of the COMPRESSION constants" for the parameters.  For any of you that found this confusing, you can find a list of the constants here:

Predefined Constants
http://www.php.net/manual/en/imagick.constants.php

As an example for working with a jpeg image:

<?php
    $image
= 'jpeg_image.jpg';
   
$comression_type = Imagick::COMPRESSION_JPEG;
   
   
$im = new Imagick($image);
   
$im->setImageCompression($compression_type);
?>

This class does not actually compress the images but rather sets the compression type that is going to be used. 

If you would like to see how to compress the image see:
Imagick::setImageCompressionQuality
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0
jacob at fragdev dot com
3 months ago
On Ubuntu 18.04, these are the default compression methods used for the following common image formats:

PNG:  Imagick::COMPRESSION_ZIP
JPEG: Imagick::COMPRESSION_JPEG
GIF:  Imagick::COMPRESSION_LZW
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