Creating web thumbnails with PHP Imagick

Erin — Wed, 17 Mar 2010 00:13:25 +0000

It may seem like a subject that has been done to death, but creating thumbnails from images can be a complex and frustrating task, especially when you’re faced with a wide variety of formats in your source images.

The script below uses PHP’s Imagick extension to create a thumbnail from pretty much any source image. It can handle RGB & CMYK images, TIFFs, PNGs, JPEGs, GIFs, BMPs and just about any other format in just about any size, and it can also handle images with embedded colour profiles (this is very helpful when converting images created in Adobe software).

You’ll firstly need to grab the standard sRGB colour profile from the International Color Consortium (ICC) website. Place this somewhere accessible to your script and you’re ready to go.

// the location of your image
$imagePath = '/path/to/source_image';

// these are treated as maximums and aspect ratio is maintained
$thumbnailWidth = 100;
$thumbnailHeight = 100;

// path to the sRGB ICC profile
$srgbPath = '/path/to/sRGB_v4_ICC_preference.icc';

// load the original image
$image = new Imagick($imagePath);

// get the original dimensions
$width = $image->getImageWidth();
$height = $image->getImageHeight();

// set colour profile
// this step is necessary even though the profiles are stripped out in the next step to reduce file size
$srgb = file_get_contents($srgbPath);
$image->profileImage('icc', $srgb);

// strip colour profiles
$image->stripImage();

// set colorspace
$image->setImageColorspace(Imagick::COLORSPACE_SRGB);

// determine which dimension to fit to
$fitWidth = ($thumbnailWidth / $width) < ($thumbnailHeight / $height);

// create thumbnail
$image->thumbnailImage(
$fitWidth ? $thumbnailWidth : 0,
$fitWidth ? 0 : $thumbnailHeight
);

// generate a thumbnail filename
$imagePathParts = pathinfo($imagePath);
$thumbnailPath =
$imagePathParts['dirname'].'/'.
$imagePathParts['filename'].'_'.
$thumbnailWidth.'x'.$thumbnailHeight.
'.jpg';

// save thumbnail and free up memory
$image->writeImage($thumbnailPath);
$image->clear();
$image->destroy();

Help stop the Great Firewall of Oz!

Erin — Sun, 14 Dec 2008 22:16:00 +0000

This is just a quick post to try and rally a few signatures against the ridiculous mandatory internet filter proposed for Australia.

There are so many reasons why this should not go ahead. I won’t go into detail here, but you should learn more if you don’t know what I’m on about. Try Horus Kol’s article, or No Clean Feed for some good information.

Please use this nifty form to show your support for the fight against mandatory internet censorship:

In addition, there is another petition you can sign at TakingITGlobal.

Ezzatron » internet

Creating web thumbnails with PHP Imagick

Help stop the Great Firewall of Oz!