关键词: 干涉合成孔径雷达, 干涉相位图, 相位滤波, 自适应区域增长

Abstract:

This paper proposes a new adaptive noise suppressing method for interferometric phase images. The key point of noise filtering for interferometric phase images is the selection of the independent and identically distributed (i.i.d.) samples. The proposed method determines filtering samples with the criterion of the minimum phase differences according to the region-growing strategy, and then computes the filtered phase in the complex domain. Due to the minimum phase difference, the proposed method selects the filtering samples that obey the i.i.d. assumption more accurately, thus improving the filtering performance. Finally, experiments carried out on simulated and real data confirm that the proposed method possesses a better filtering performance and has the ability to suppres the noise effectively while maintaining the interferogram details adequately.

Key words: synthetic aperture radar interferometry (InSAR), interferogram, phase filtering, adaptive region growing