This program is written by Hussein Abdul-Rahman and Munther Gdeisat to program the three-dimensional phase unwrapper entitled "Fast three-dimensional phase-unwrapping algorithm based on sorting by reliability following a noncontinuous path" by Hussein Abdul-Rahman, Munther A. Gdeisat, David R. Burton, and Michael J. Lalor, published in the Applied Optics, Vol. 46, No. 26, pp. 6623-6635, 2007.
It was wrapped into a python module by Alan Kuurstra.