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 )

Внимание

К настоящему времени эта функция еще не была документирована; для ознакомления доступен только список аргументов.

Sets the object's default compression quality.

Список параметров

quality

Возвращаемые значения

Returns TRUE on success.

Коментарии

Nov 17

Автор: sebastian dot moser at gmail dot com


Use this example to see how image compression works:



<?php

// load an image

$img = new Imagick("test.jpg");



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

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

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

$img->setComressionQuality(80);



// set content type

header("Content-type: image/jpeg");

// write image

echo $img->getImageBlob();

?>

2007-11-17 12:46:52

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

Mar 27

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();

}



?>

2008-03-27 06:24:04

http://php5.kiev.ua/manual/ru/function.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 12:59:33

http://php5.kiev.ua/manual/ru/function.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);

?>