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The development of a unique discrete modulation transfer function (DMTF) [1] has solved the previous problem of multivalued modulation transfer function associated with the non-isoplanatic nature of discrete systems. This paper proposes two methods for the measurement of the DMTF and shows that the use of the DMTF makes the performance analysis and measurement of discrete systems easier.
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Lettington et al. (1993) studied this question.
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