Comparison among Quality Maps Applying in Phase Unwrapping for Different Terrain

This paper introduces three kinds of the quality maps, and describes the two algorithms using the quality maps in 2-D phase unwrapping: quality-guided phase unwrapping algorithm and mask cut phase unwrapping algorithm. We apply the two algorithms in the phase unwrapping for the InSAR data in the two different conditions: the steep terrain and the flat terrain. We analyze and compare two aspects of the results: the visual analysis and the quantitative analysis. The experimental results show that the steep terrain´s result is most reliable using the phase derivative variance map as the quality map, but the flat terrain´s result is most precise using the pseudo-correlation map as the quality map.