1. A system for enhancing a first pictorial representation of am image within a first frequency band so as to provide an enhanced pictorial representation of said image using information contained within at least a second pictorial representation of said image within a second frequency band, wherein said second pictorial representation of said image has a better resolution than said first pictorial representation of said image, said system comprising: means for generating a first plurality of signals as a function of a first set of pictorial segments of said first pictorial representation, wherein each of said first pictorial segments comprises at least one component part; means for generating a second plurality of signals as a function of a second set of pictorial segments of said second pictorial representation, said second set of pictorial segments spatially corresponding with respect to said image to said first set of pictorial segments; means, responsive to said first and second plurality of signals, for generating a third plurality of signals as a function of respective correlation information associated with and between each of said pictorial segments of said first set of pictorial segments and the corresponding pictorial segment of said second set of pictorial segments; means, responsive to said first and third plurality of signals, for generating a fourth plurality of signals as a function of a pictorial component part of each pictorial segment of a third set of pictorial segments representative of said enhanced pictorial representation, wherein the pictorial segments of said third set spatially correspond with respect to said image to the pictorial segments of said first set, and each of said pictorial component parts of each of said pictorial segments of said first pictorial representation is modified as a function of the respective correlation information associated with that pictorial segment so as to provide each corresponding pictorial component part of said enhanced pictorial representation; and means for combining said fourth plurality of signals so as to produce said enhanced pictorial representation.