Interactive filter design in the Z-plane
, by Jon Claerbout
I wrote a program for filtering seismic gathers or sections on a Sun 3/10
workstation. The user specifies the filters with a mouse by placing poles
and zeros in a complex plane represented on a video screen. A display of
the filter and its spectrum is updated "instantly" after any poles or zeros
are moved. Filtering a plane of data takes about 3-30 seconds.
STANFORD