The following function applies a callback to each image in an Imagick object.
<?php
function imagickMap($callback, $im)
{
$im->setFirstIterator();
do
{
$callback($im);
}
while ( $im->nextImage() );
}
?>
E.g. to convert a series of images to grayscale:
<?php
imagickMap(
function($im)
{
$im->setImageType(Imagick::IMGTYPE_GRAYSCALEMATTE);
},
$im
);
?>
Imagick::nextImage
(PECL imagick 2, PECL imagick 3)
Imagick::nextImage — Moves to the next image
Description
Associates the next image in the image list with an Imagick object.
Parameters
This function has no parameters.
Return Values
Returns true on success.
add a note
User Contributed Notes 2 notes
simonjjarrett at gmail dot com ¶
4 years ago
markus dot s dot schmitz at gmail dot com ¶
11 years ago
Convert PDF to JPG page-wise:
<?php
$i = 0;
$imagick = new Imagick();
$imagick->readImage('myfile.pdf');
while($imagick->hasNextImage()) {
$imagick->writeImage(++$i.'-converted.jpg', false);
$imagick->nextImage();
}
?>
See also: http://php.net/manual/en/imagick.readimage.php
