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It is shown how all global Wigner distribution moments of arbitrary order can be measured as intensity moments in the output plane of an appropriate number of separable first-order optical systems (generally anamorphic ones). The minimum number of such systems that are needed for the determination of these moments is derived.doi:10.1155/asp.2005.1535 fatcat:s7dzb2e6wfgpzkuklf4p3czfvq