Install JMagick

1. Install imagemagick: sudo apt-get install imagemagick --fix-missing
2. Install jmagick: sudo apt-get install jmagick --fix-missing
3. Make sure that jmagick binary files (jmagick*.so or jmagick*.dll for windows os) are accessible for jvm. This files mast be present in /usr/lib for linux os or in java_home/bin folders. If this files are absent simple copy it from jmagick installation package

If you start with Tomcat. Set variables

-Djava.library.path=/usr/local/lib
-Djmagick.systemclassloader=no

[Update] 
If you use Windows x64 and tomcat 7

1. Download jdk for i586 arhitecture
2. Copy jmagick.jar to JAVA_HOME_i586/jre/liv/ext directory
3. Copy jmagick.dll to system_32