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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: |
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| 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 | ||||||||
| HGF - Program: | Space | ||||||||
| HGF - Program Themes: | W EO - Erdbeobachtung | ||||||||
| DLR - Research area: | Space | ||||||||
| DLR - Program: | W EO - Erdbeobachtung | ||||||||
| DLR - Research theme (Project): | W - Projekt TanDEM-X | ||||||||
| 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: | 06 May 2013 15:16 |
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