(No version information available, might only be in SVN)
Imagick::setImageCompressionQuality — Sets the image compression quality
Sets the image compression quality.
The image compression quality as an integer
Liefert TRUE bei Erfolg.
Wirft ImagickException bei Fehlern.
This example shows how to set the compression type, set the compression quality, create a thumbnail and remove unnecessary data in order to reduce file size.
This will use the following functions in reference:
Imagick::setImageCompression
Imagick::setImageCompressionQuality
Imagick::stripImage
Imagick::thumbnailImage
Imagick::writeImage
<?php
$image = 'image.jpg';
$directory = '/path/to/image';
$image_location = $directory . "/" . $image;
$thumb_destination = $directory . "/t" . $image;
$compression_type = Imagick::COMPRESSION_JPEG;
$im = new Imagick($image_location);
$thumbnail = $im->clone;
$thumbnail->setImageCompression($compression_type);
$thumbnail->setImageCompressionQuality(40);
$thumbnail->stripImage();
$thumbnail->thumbnailImage(100,null);
$thumbnail->writeImage($thumb_destination);
?>
Now, obviously you don't have to do so much with the variables and the file location. I only used so many to demonstrate where the images are coming from and where they are going.
NOTE: The $thumbnail->thumbnailImage(100,null); keeps the aspect ration by setting the second parameter to null. Read about this at Imagick::thumbnailImage
There is another way to create thumbnails that works quite well if you want to crop the image rather than using the entire image. Check out Imagick::cropThumbnailImage