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An Adaptive Contoured Window Filter for Interferometric Synthetic Aperture Radar

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5 Author(s)
Qifeng Yu ; Coll. of Aerosp. Eng., Nat. Univ. of Defense Technol., Changsha ; Xia Yang ; Sihua Fu ; Xiaolin Liu
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An adaptive contoured window filter is proposed to filter off the noise from phase images of interferometric synthetic aperture radar (InSAR) in this letter. The contoured windows can best satisfy the requirement that constrains the phase signal constant inside windows on which low-pass filtering can remove the noise well while the fringe phases are well preserved. The contoured windows are determined by tracing along the local fringe orientation. An algorithm for determining window sizes adaptive to the fringe density is also proposed. The theoretical analysis and experiments prove that the proposed filter can greatly remove decorrelation noise while preserving the fringe phase well, even for those fringes with strong curvatures for InSAR processing

Published in:

IEEE Geoscience and Remote Sensing Letters  (Volume:4 ,  Issue: 1 )