Imagick::setImageCompression

(PECL imagick 2.0.0)

Imagick::setImageCompressionSets the image compression

Opis

Imagick::setImageCompression ( int $compression ) : bool

Parametry

compression

One of the COMPRESSION constants

Zwracane wartości

Zwraca TRUE w przypadku sukcesu.

Błędy/Wyjątki

Zgłasza wyjątek ImagickException w przypadku błędu.

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User Contributed Notes 2 notes

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7
snipes2083 [at] yahoo com
10 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
up
0
jacob at fragdev dot com
1 year 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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