Ensure that the ImageMagick binaries are in the system path
rename the convert executable to imconvert to avoid a conflict with the Windows convert.exeOR
override the transformer.ImageMagick bean found in content-services-context.xml and modify the commandMap.
(Note that this is required because at least on SUSE 10.1 the default ImageMagick executable is called convert)
Additionally, you can install JMagick if you would rather use the Java bridge to ImageMagick.
Copy the JMagick library to a location on your path or modify your system path
Ensure that the ImageMagick libraries are visible on your system path
If, when the server starts, there ISN'T a message indicating that the ImageMagick transformer didn't start then everything is OK. If you don't need the transformer and the message irritates you, you override the bean name with a dummy bean that does nothing, e.g. <extensionRoot>/alfresco/extension/custom-context.xml
Workaround for a Windows/ImageMagick 6.5.x issue
There may be an issue for Windows users of ImageMagick versions 6.5.x where thumbnails are always created with a zero file size. If DEBUG logging is enabled, a message similar to the following is generated in the log: