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2D Fourier Transforms

Seismic data are generally at least 2D datasets. If the data really are data in (time, space) coordinates, then the output should be in (frequency, wavenumber), the F-K domain. However, there are applications where we consider the data to be in two spatial dimensions (x1,x2) meaning that the output is in (k1,k2)

We have the programs

For each of these cases. Examples using suplane data are easily run using
% suplane | suspecfk | suximage title="F-K Amplitude Spectrum"  &
% suplane | suspeck1k2 | suximage title="K1-K2 Amplitude Spectrum"  &
Please note, as these are display programs, so the intent is that plots of the output should appear correct when compared with a plot of the original data. The effect of the 2D Fourier transform on a line of spikes is to produce a line of spikes normal to the original line, if the (k1,k2) data are plotted on the same plot as the (x1,x2) data,


next up previous contents
Next: Hilbert Transform, Trace Attributes, Up: Transform and Filtering Operations Previous: 1D Fourier Transforms   Contents
John Stockwell 2007-04-10