Robust 2D phase unwrapping algorithm

2D phase unwrapping algorithm based on the Transport of Intensity Equation(TIE) and unwrapped phase correction.

we develop a simple and robust phase-unwrapping algorithm based on the transport of intensity equation (TIE). In our method, the TIE was solved using the fast cosine transform, and a phase correction operation was introduced after the TIE was solved. Because of the phase correction operation, the proposed method can obtain a satisfactory unwrapping result even in a notably hash noise condition.