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Multibaseline Gradient Ambiguity Resolution To Support Minimum Cost Flow Phase Unwrapping

Lachaise, Marie and Bamler, Richard and Rodriguez Gonzalez, Fernando (2010) Multibaseline Gradient Ambiguity Resolution To Support Minimum Cost Flow Phase Unwrapping. IGARSS 2010, 26-30 July 2010, Honolulu, Hawaii, USA. ISBN 978-1-4244-9566-5. ISSN 978-1-4244-9566-5

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Abstract

The TanDEM-X Mission has as primary objective to generate a high resolution global Digital Elevation Model. This paper proposes a new method for multibaseline Phase Unwrapping which is the critical point of this generation. We propose to combine both Minimum Cost Flow (MCF) and Maximum a Posteriori (MAP) estimation. The latter is used to solve phase gradient ambiguities. The problem is posed as an energy minimization one and solved using Belief Propagation (BP) which is an iterative process. Nevertheless, although very good results are obtained on loopy graphs, it is not guaranteed to converge. Thus, phase unwrapping of the most accurate interferogram is finally performed with the MCF algorithm and takes as input the unwrapped gradients.

Document Type:Conference or Workshop Item (Speech)
Title:Multibaseline Gradient Ambiguity Resolution To Support Minimum Cost Flow Phase Unwrapping
Authors:
AuthorsInstitution or Email of Authors
Lachaise, MarieMarie.Lachaise@dlr.de
Bamler, Richardrichard.bamler@dlr.de
Rodriguez Gonzalez, Fernandofernando.rodriguezgonzales@dlr.de
Date:25 July 2010
Refereed publication:No
Page Range:pp. 4411-4414
ISSN:978-1-4244-9566-5
ISBN:978-1-4244-9566-5
Status:Published
Keywords:TanDEM-X, multibaseline phase unwrapping, Minimum Cost Flow, Belief Propagation
Event Title:IGARSS 2010
Event Location:Honolulu, Hawaii, USA
Event Type:international Conference
Event Dates:26-30 July 2010
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Projekt TanDEM-X (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Remote Sensing Technology Institute > SAR Signal Processing
Deposited By: Marie Lachaise
Deposited On:26 Oct 2010 09:15
Last Modified:21 Mar 2014 10:14

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