So far, we have discussed Fourier transformations involving one-dimensional functions. Of course, in studying imaging, the concept
must be generalized to 2D and 3D functions. For example, diffraction and 2D image formation are treated efficiently via 2D Fourier
transforms, while light scattering and tomographic reconstructions require 3D Fourier transforms.
Also In this section we review the main features of Maxwellâ��s Equations in differential forms. We discuss these equations in different representations, i.e. space-time (r, t), space-frequency (r, Ï�), and wavevector-frequency (k, Ï�).
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University of Illinois at Urbana-Champaign, Urbana, IL