Conference Proceeding

Bayesian restoration of interferometric phase through biased anisotropic diffusion

German Aerosp. Center, Oberpfaffenhofen, Germany
08/2009; DOI:10.1109/IGARSS.2009.5417743 In proceeding of: Geoscience and Remote Sensing Symposium,2009 IEEE International,IGARSS 2009, Volume: 5
Source: IEEE Xplore

ABSTRACT In this paper a new Bayesian algorithm for interferometric phase restoration is presented. Based on a non-linear anisotropic extension of Orientation Diffusions, the inherent directionality of the fringe structure is introduced into its prior model. It also accounts for the periodicity of the phase representation. A fidelity term derived from the anisotropic metrics and the InSAR phase statistics deviates diffusion towards the acquired phase value. It acts as an adapted likelihood of the diffused phase. Hence, phase restoration is a trade-off between directionality and reconstruction fidelity, prior and likelihood. Results are provided on a High Resolution Spotlight scene acquired by TerraSAR-X.

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Keywords

acquired phase value
 
adapted likelihood
 
anisotropic metrics
 
fidelity term
 
interferometric phase restoration
 
new Bayesian algorithm
 
Orientation Diffusions
 
phase representation
 
phase restoration
 
prior
 
prior model
 
reconstruction fidelity
 
TerraSAR-X
 
trade-off