Interferometric SAR two-dimensional phase unwrapping algorithms

摘要

In this paper, the consistency and inconsistency of the two-dimensional phase field is discussed in detail. The mathematical framework of the main phase unwrapping algorithms is also provided. The residue-cut method the preconditioned conjugate gradient method, and the minimum cost flow method are compared and analyzed through numerical tests. It is found that the accuracy of the minimum cost flow method is better than the other two methods. The branch cut method is the most efficient among the three algorithms in computation. However the minimum cost flow method is the least efficient in computation. Each phase unwrapping algorithm has its own advantage and disadvantage, so we should choose the adequate algorithm for the phase unwrapping according to the character of the interferogram.