  The Fourier transform of the deeply virtual Compton scattering amplitude
(DVCS) with respect to the skewness parameter \zeta= Q^2/ 2 p.q can be used to
provide an image of the target hadron in the boost-invariant variable \sigma,
the coordinate conjugate to light-front time \tau=t+ z/ c. As an illustration,
we construct a consistent covariant model of the DVCS amplitude and its
associated generalized parton distributions using the quantum fluctuations of a
fermion state at one loop in QED, thus providing a representation of the
light-front wavefunctions of a lepton in \sigma space. A consistent model for
hadronic amplitudes can then be obtained by differentiating the light-front
wavefunctions with respect to the bound-state mass. The resulting DVCS helicity
amplitudes are evaluated as a function of \sigma and the impact parameter \vec
b_\perp, thus providing a light-front image of the target hadron in a
frame-independent three-dimensional light-front coordinate space. Models for
the LFWFs of hadrons in (3+1) dimensions displaying confinement at large
distances and conformal symmetry at short distances have been obtained using
the AdS/CFT method. We also compute the LFWFs in this model in invariant three
dimensional coordinate space. We find that in the models studied, the Fourier
transform of the DVCS amplitudes exhibit diffraction patterns. The results are
analogous to the diffractive scattering of a wave in optics where the
distribution in \sigma measures the physical size of the scattering center in a
one-dimensional system.
