Imagick::setImageCompressionQuality

(No version information available, might only be in SVN)

Imagick::setImageCompressionQuality — Sets the image compression quality

Описание

bool Imagick::setImageCompressionQuality ( int $quality )

Sets the image compression quality.

Список параметров

quality: The image compression quality as an integer

Возвращаемые значения

В случае успешной работы возвращает TRUE.

Ошибки

Бросает ImagickException при ошибке.

Коментарии

Mar 28

Автор: snipes2083 [at] yahoo com


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