I've collected a bunch of stuff that is either: Grandiose preaching from the pulpit ... Create 3 image plane widgets, attach them to the interactor ...
Understand what a neighborhood is and and the ... Use neighborhoods to implement a convolution/correlation filter ... Your arch-nemesis... image boundaries ...
ITK was intentionally designed without visualization tools. Visualization is very helpful for novice users ... Don't worry about the details (yet) - your job ...