AN IMPROVED ALGORITHM OF WEIGHTEDLEAST-SQUARES FOR PHASE UNWRAPPING
Dong Chunmin 1) ; Liu Guolin 1,2) ; Yu Shengwen 1) ; Liu Weike 1) ; and Zhou Wei 1)
1)Geomatics College, Shandong University of Science and Technology, Qingdao 2665102)Key Laboratory of Surveying and Mapping Technology on Island and Reef, State Bureau of Surveying and Mapping, Qingdao 266510
Abstract Phase unwrapping is the key step in topographic elevation mapping and reconstruction of threedimensional terrain model by Interferometric Synthetic Aperture Radar (InSAR). Considering the problem that the existing weighted and unweighted leastsquares phase unwrapping results need smoothing, an improved algorithm using phase derivative variance map based on the principle of Leastsquares phase unwrapping is proposed . With the real InSAR data, by comparison of the improved algorithm with the existing weighted and unweighted leastsquares algorithm, it is verified that the proposed algorithm can effectively deal with the situation that there are too many residues and can get a higher accurate and reliable phase unwrapping results.
Key words ：
InSAR
phase unwrapping
weighted leastsquares
phase derivative variance
residue
Received: 01 January 1900
Corresponding Authors:
Dong Chunmin
Cite this article:
Dong Chunmin ,Liu Guolin,Yu Shengwen et al. AN IMPROVED ALGORITHM OF WEIGHTEDLEAST-SQUARES FOR PHASE UNWRAPPING[J]. , 2011, 31(Supp.): 90-93.
Dong Chunmin ,Liu Guolin,Yu Shengwen et al. AN IMPROVED ALGORITHM OF WEIGHTEDLEAST-SQUARES FOR PHASE UNWRAPPING[J]. jgg, 2011, 31(Supp.): 90-93.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2011/V31/ISupp./90
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