ImageMagick 6.6.x

Since the default version of ImageMagick installed by yum on CentOS 5.5 is  6.2.something, and you want to be able to do all the cool stuff that ImageMagick 6.5.* and 6.6.* can do, you’re gonna have to compile it from source yourself. Don’t worry – it’s easy, and it works.

How to Get ImageMagick 6.5.x or 6.6.x Working on CentOS ...