Anisotropic ADCIGs are based on the generalization of integral migration
to the computation of a prestack image that includes the
subsurface-offset dimension () in addition to the usual image depth () and midpoint (). Figure illustrates the subsurface-offset dimension: the image point belongs to the migration response of an
impulse recorded at midpoint mD, surface offset hD and travel time tD, provided that the
travel time along the source and receiver paths (of length Ls and Lr, respectively) is equal to
Illustration of generalized migration, where the prestack image is a
function of the subsurface offset and and are the
group aperture and dip angles, respectively.