For image manipulation ImageMagick (IM) is really nice. However IM is not natively supported by PHP. Kohana supports IM using a shell wrapper simply because that is the only way to support IM without PECL dependancies.
While this means we can't use Imagick (the PECL extension) using the official Kohana release, this doesn't mean we can't write our own Kohana Image driver.
Since I have total freedom on my servers I wanted to use Imagick instead of the shell wrapper and wrote a Imagick driver.
Download
The most recent version: http://www.dynom.nl/kohana/Imagick/Imagick.php.txt [Last update: Feb 7th 2008]
Installation
To install this driver, copy Imagick.php to your: ./system/libraries/drivers/Image/Imagick.php
And set your default driver to 'Imagick', by setting $config['driver'] = 'Imagick'; in your ./application/config/image.php (copy it from system if you don't have it in your application folder)
Usage
Since it's a driver it handles all library features, for a overview of the features, see: http://doc.kohanaphp.com/libraries/image
Requirements
The most up-to-date requirements are listed in the driver itself.
Support
Use the Kohana forums at: http://forum.kohanaphp.com I'll try to help you best I can there.