set density parameter for imagick with php
12,826
Solution 1
You need to set Resolution before you read the file.
$im = new imagick();
$im->setResolution(200,200);
$im->readImage(__DIR__ . DIRECTORY_SEPARATOR.$PDFName.'['.$i.']');
Than, the result will be perfect.
Hope this help someone.
Solution 2
From the manual http://php.net/manual/en/imagick.setresolution.php
Imagick::setResolution() must be called before loading or creating an image.
See this answer Pdf to image using php-imagick api
Author by
dechiffre
Updated on June 13, 2022Comments
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dechiffre almost 2 years
I want to convert a pdf page to a png image with Imagick.
I tried with PHP, but the image quality was very low.
When I tried with command line, the result was perfect.PHP code
$im = new imagick( __DIR__ . DIRECTORY_SEPARATOR.$PDFName.'['.$i.']' ); $params = $im->identifyImage(); $width = $params['geometry']['width']*1; $height = $params['geometry']['height']*1; $im->setResolution(400,400); $im->resizeImage($width ,$height, imagick::FILTER_SINC, 1, true); $im->writeImage(__DIR__ . DIRECTORY_SEPARATOR.'pdf_pages\\'.$i.'.png'); $im->clear(); $im->destroy();
Command line code
convert -density 400 a.pdf -resize 25% -a.png
PHP code (2nd attempt)
$im = new imagick( __DIR__ . DIRECTORY_SEPARATOR.$PDFName.'['.$i.']' ); $im->setOption('density','400x400'); $im->setOption('resize','25%'); $im->writeImage(__DIR__ . DIRECTORY_SEPARATOR.'pdf_pages\\'.$i.'.png'); $im->clear(); $im->destroy();
Still bad results.
What can I do? I want to use the density parameter in my PHP code, but how?
Output with PHP
Output with command line