ImageJ is a public domain Java image processing program extensively used in life sciences. The program was designed with an open architecture that provides extensibility via Java plugins.  User-written plugins make it possible to solve almost any image processing or analysis problem or integrate the program with 3rd party software. The Active Segmentation plugin is a complete redesign of Trainable Weka Segmentation (TWS) for ImageJ. Learn more at: http://neuroinformatics.be/