ImageApp is a program that involves a lot of principles from machine vision. A GUI that allows you to build up an image processing graph. An image processing graph is essentially a sequence of algorithms that do something to images. You can imagine the graph as the algorithms being the nodes and the flow-of-->data between the algorithms being the arcs.

For instance,
You could have the sequence of filtering the image to remove noise, then extracting the edges using a Sobel edge operator, then running a line finding algorithm and so on. In mathematical terms this graph is known as a Directed Acyclic Graph (DAG).

ImageApp is an attempt to allow users to build up these image processing graphs using drag and drop. It uses the excellent library from Sun called Java Advanced Imaging (JAI) and also in the latest version an excellent graph API called JGraph.