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A Combined Phase Unwrapping Algorithm Based on Quality-guided and Minimum Discontinuity for InSAR |
Zhong He-ping Tang Jin-song Zhang Sen |
Electronic College of Engineering, Naval University of Engineering, Wuhan 430033, China |
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Abstract A two-dimensional phase unwrapping algorithm is proposed for InSAR based on quality-guided and minimum discontinuity. The wrapped phase is partitioned into high and low quality areas according to its quality map, and the quality-guided algorithm is used to retrieve the phase of the high quality areas. Then the unwrapped high quality areas are taken as abstract phase points, and the minimum discontinuity algorithm is performed in the interior of low quality areas and the abstract phase points to retrieve the final unwrapped phase. The experimental result performed on real InSAR data shows that the proposed approach overcomes the drawbacks of the quality-guided and minimum discontinuity algorithms which both tend to spread the errors, and has the advantages of keeping the accuracy of the unwrapped phase in the high quality areas and also improving efficiency.
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Received: 05 May 2010
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Corresponding Authors:
Tang Jin-song
E-mail: tjsgxpcn@sohu.com
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