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bytespider/imagick_transparency.php

Created November 8, 2016 10:40
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Setting the background colour of a transparent PNG when converted to JPEG
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imagick_transparency.php
<?php
$image = new Imagick('kiwi.png'); // https://s13.postimg.org/hakfstg1j/kiwi.png
$image->setImageBackgroundColor(new ImagickPixel('white')); // set the background color of the image
$image->setImageAlphaChannel(Imagick::ALPHACHANNEL_BACKGROUND); // ALPHACHANNEL_BACKGROUND is undocumented and has a value of 2
// save a JPEG
$image->setImageFormat('jpeg');
$image->setImageCompression(Imagick::COMPRESSION_JPEG);
$image->setImageCompressionQuality(80);
$image->writeImage('kiwi.jpg');
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