|This page contains a java applet which is blocked by some web browsers. You will have to allow blocked content if you want to run the java applet, otherwise just download the code and have a look.|
The following applet demonstrates why Fiducial Registration Error (FRE) should not be reported as Target Registration Error (TRE), unless the fiducials are also the targets.
Fiducial points are red and target points are green. To manipulate the point set just drag the coordinate axis, this will affect the set marked with Xs. Dragging the origin translates the points. Dragging/rotating the tips of the coordinate system will rotate the points.
Source CodeThe source code for this applet and an application that allows you to save and load point sets is available here (java, zip file).