关键词: 干涉合成孔径雷达, 滤波, 干涉条纹, 多视处理

Abstract:

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