I didn’t notice until now that the class PerspectiveTransform uses JaiI18N in case of errors since I have Java Advanced Imaging (and hence JaiI18N) installed on my system. JaiI18N is actually only required to compile the software since errors in PerspectiveTransform shouldn’t occur in the way I use it. Hope that explains things a bit. The easiest way to fix the problem for you is to install Java Advanced Imaging as well.
Uwe