Comparison between the residue-vector map and existing quality maps for phase unwrapping

Abstract

Many robust phase unwrapping algorithms rely on having good quality or weighting maps. In essence, we present a general comparison between the residue-vector map and existing quality maps for phase unwrapping to evaluate the importance of the newly established residue-vector technique in the phase unwrapping context. Such quality maps used for comparison are phase derivative variance, maximum phase gradient, pseudo-correlation, weighted phase derivative variance and second difference. Flynn's minimum discontinuity phase unwrapping algorithm was used on the same wrapped phase but with different quality maps for result evaluation. It was found that the residue-vector map was the most robust of all.