COMPARISON AMONG METHODS OF FILTERING AND PHASE UNWRAPPING FOR SAR INTERFEROGRAM
Li Tao 1) ;Zhang Shiyu 1) ; and Zhou Chunxia 2)
1)GNSS Engineering Research Center, Wuhan University, Wuhan 4300792)Chinese Antarctic Center of Surveying and Mapping, Wuhan University, Wuhan 430079
Abstract On the basis of the framework of L P norm, the mathematic model of classic phase unwrapping methods is studied. Phase unwrapping methods are classed into three types. The topographic SAR interferogram in Bam region of Iran is analyzed with these phase unwrapping methods.The results show that the Goldstein filtering method can improve effectively the distribution of residuals and branch cuts and raise the visual effects of the interferogram as well as the ratio of signal to noise. The L 1norm methods based on network currents can achieve an optimal resolving, but the efficiency is rather low, the
L 2norm method can obtain better optimal resoloring and has better efficiency,
L 0norm algorithm performed best in efficiency, but with discontinuity and uncertainty.
Key words ：
SAR
filtering
phase unwrapping
L P
branch cut method
Received: 01 January 1900
Corresponding Authors:
Li Tao
Cite this article:
Li Tao ,Zhang Shiyu ,and Zhou Chunxia . COMPARISON AMONG METHODS OF FILTERING AND PHASE UNWRAPPING FOR SAR INTERFEROGRAM[J]. , 2007, 27(1): 59-64.
Li Tao ,Zhang Shiyu ,and Zhou Chunxia . COMPARISON AMONG METHODS OF FILTERING AND PHASE UNWRAPPING FOR SAR INTERFEROGRAM[J]. jgg, 2007, 27(1): 59-64.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2007/V27/I1/59
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