Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/53327
Title: Two new practical methods for phase unwrapping
Authors: Lim, Hock 
Xu, Wei 
Huang, Xiaojing 
Issue Date: 1995
Source: Lim, Hock,Xu, Wei,Huang, Xiaojing (1995). Two new practical methods for phase unwrapping. International Geoscience and Remote Sensing Symposium (IGARSS) 1 : 196-198. ScholarBank@NUS Repository.
Abstract: In phase unwrapping, an error made at a pixel has a tendency to spread and corrupt the phase values over large areas of an interferogram. It is therefore important that a phase unwrapping algorithm be designed with a mechanism to unwrap the areas with reliable data first and to stop itself from unwrapping across a pixel at which the unwrapped phase cannot be determined with confidence. Two new practical phase unwrapping methods incorporating this requirement are reported in this paper. The first method uses the consistency between predicted phase values as a measure of confidence. The second method considers local variations of the phase value and decides if appropriate unwrapping of individual pixels will allow confident fitting of a plane over a 3-by-3 pixel region. Both of these methods have been found to be capable of unwrapping reasonably noisy SAR interferograms.
Source Title: International Geoscience and Remote Sensing Symposium (IGARSS)
URI: http://scholarbank.nus.edu.sg/handle/10635/53327
Appears in Collections:Staff Publications

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