Journal of University of Chinese Academy of Sciences >
A fast filtering algorithm for interferometry fringe
Received date: 2010-06-07
Revised date: 2010-08-10
Online published: 2011-05-15
We present a fast filtering algorithm to solve the problem that traditional filtering algorithm filters the interferometry fringe very slowly. First the complex multiplication of the single-look-complex images of the two channels is implemented to generate InSAR complex data. Then azimuth multi-look processing and fast mean filter are done to the real and imaginary parts of the InSAR complex data, respectively, to produce the interferometry fringe. Finally, the fast median and mean filters are done to the interferometry fringe. During the filtering, the window information of the neighborhood pixels is adequately used to reduce the computation to a great extent and enhance the filtering speed with the filtering quality mainteined. Comparison with the real InSAR data filtered shows effectiveness of the algorith.
Key words： InSAR; filtering; interferometry fringe; multi-look processing
CHEN Li-Fu , WANG Bing-Nan , XIANG Mao-Sheng . A fast filtering algorithm for interferometry fringe[J]. Journal of University of Chinese Academy of Sciences, 2011 , 28(3) : 349 -354 . DOI: 10.7523/j.issn.2095-6134.2011.3.011
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