Cool to see this popping up again. It always impresses if you haven't seen it before and is a cool algorithm to work through.

The original paper was discussed on slashdot and back at that time I was inspired to build a little GUI around an open source algorithm implementation to play with my Qt skills.

It allows you to shrink, expand and "mask out" regions you don't want touch etc.

Still available on Google Code archive:

https://code.google.com/archive/p/seam-carving-gui/