Imagick::setCompressionQuality

(PECL imagick 0.9.10-0.9.9)

Imagick::setCompressionQuality — Sets the object's default compression quality

Описание

bool Imagick::setCompressionQuality ( int $quality )

Sets the object's default compression quality.

Предостережение

This method only works for new images e.g. those created through Imagick::newPseudoImage. For existing images you should use Imagick::setImageCompressionQuality().

Список параметров

quality

Возвращаемые значения

В случае успешной работы возвращает TRUE.

Примеры

Пример #1 Imagick::setCompressionQuality()


<?php
function setCompressionQuality($imagePath, $quality) {

    $backgroundImagick = new \Imagick(realpath($imagePath));
    $imagick = new \Imagick();
    $imagick->setCompressionQuality($quality);
    $imagick->newPseudoImage(
        $backgroundImagick->getImageWidth(),
        $backgroundImagick->getImageHeight(),
        'canvas:white'
    );

    $imagick->compositeImage(
        $backgroundImagick,
        \Imagick::COMPOSITE_ATOP,
        0,
        0
    );
    
    $imagick->setFormat("jpg");    
    header("Content-Type: image/jpg");
    echo $imagick->getImageBlob();
}

?>

Коментарии

Mar 26

Автор: nVaux.com


Sebastian's example works excellent, just one minor spelling mistake, it will give you an error otherwise.



<?php

$img->setCompression(Imagick::COMPRESSION_JPEG);

$img->setCompressionQuality(80);

?>



I used Sebastians example, and made one that compresses all the images within a directory:



<?php

$images = new Imagick(glob('images/*.jpg'));



foreach($images as $image)

{

    // compression methods, see "Contants"-page for Imagick

    $image->setCompression(imagick::COMPRESSION_JPEG);

    // a value between 1 and 100, 1 = high compression, 100 low compression

    $image->setCompressionQuality(80);

    $image->writeImage();

}



?>

2008-03-26 22:24:04

http://php5.kiev.ua/manual/ru/imagick.setcompressionquality.html

Mar 18

Автор: deeps chennai


A note for people who just couldn't get this working..



With PHP 5.1.6, the below works:



<?php

$img->setCompression(Imagick::COMPRESSION_JPEG);

$img->setCompressionQuality(80);

?>



However, with higher versions of PHP (I tried on PHP 5.2.10), the code has no effect (and there are no exceptions or warnings thrown by Imagick as well).



The code that works instead is:



<?php

$img->setImageCompression(Imagick::COMPRESSION_JPEG);

$img->setImageCompressionQuality(80);

?>



and this is backwards compatible (Works on PHP 5.1.6 as well as 5.2.10)

2010-03-18 04:59:33

http://php5.kiev.ua/manual/ru/imagick.setcompressionquality.html

Aug 03

Автор: charles dot hall at sas dot com


I had to insert a call to "stripImage()" in order to actually see the filesize shrink.



<?php

   $img = new Imagick();

   $img->readImage($src);

   $img->setImageCompression(imagick::COMPRESSION_JPEG);

   $img->setImageCompressionQuality(90);

   $img->stripImage();

   $img->writeImage($dest);

?>