A new phase unwrapping method of interferogram

In this paper, a new two-dimensional phase unwrapping method of interferogram will be present. The method is based on the Goldstein´s Branch-cut method and Region-growing method. After the unwrapping of the interferogram by using Goldstein´s Branch-cut method, the amplitude image and coherence image were used to extract the error regions. And the error regions were classified into two types, which were processed by Region-growing method and Inverse Distance to a Power interpolating method respectively. The proposed method was tested with the Etna SIR-C/X-SAR interferogram, and satisfied results were achieved.