Comparison of Harmonic, Geometric and Arithmetic means for change detection in SAR time series

The amplitude distribution in a SAR image can present a heavy tail. Indeed, very high-valued outliers can be observed. In this paper, we propose the usage of the Harmonic, Geometric and Arithmetic temporal means for amplitude statistical studies along time. In general, the arithmetic mean is used to compute the mean amplitude of time series. In this study, we will show that comparing the behaviour of the Harmonic, Geometric and Arithmetic means, enables a change detection method along SAR time series.