Quality assessment of despeckled SAR images

An innovative approach is here proposed for the quality assessment of despeckled SAR images. Both statistic and frequency analysis have been developed. Different statistic indexes, presented in literature and based on mean and standard deviation values, have been considered and new indexes are then proposed, able to gain a quantitative evidence of the visual comparison. The novel frequency analysis here presented allows to measure quantitatively mean preservation and isotropic behaviour of filters and overcomes the problems of the deterministic and statistical approaches. Different non-linear adaptive filters have been tested on various Cosmo/Skymed images acquired in different configuration modes.