Imagick
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Imagick::setImageCompression

(PECL imagick 2.0.0)

Imagick::setImageCompression — Sets the image compression

说明

bool Imagick::setImageCompression ( int $compression )

参数

compression

One of the COMPRESSION constants

返回值

成功时返回 TRUE .

错误/异常

错误时抛出 ImagickException .

Imagick
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PHP手册 - N: Sets the image compression

用户评论:

snipes2083 [at] yahoo com (28-Mar-2010 06:03)

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