[comp.lang.idl-pvwave] Cubic interpolations

gsh7w@astsun9.astro.Virginia.EDU (Greg Hennessy) (03/18/91)

I am posting this for a friend who is currently without acces to
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has their e-mail at the end.

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I am looking for an IDL procedure, or a FORTRAN or C program that
can be linked to IDL, which would rotate images using a cubic
interpolation algorithm.   More generally, I would be looking for
an emulation of POLY_2D that would include a cubic interpolation option.

Our group has found (using a mainframe) that rotation with cubic
interpolation significantly reduces the smearing that can occur when
using the bilinear algorithm.    There is, of course, a significant
increase in computation time, but workstations are now powerful enough
that this can be an interactive option.


Wayne Landsman
ST Systems Co.
landsman@stars.gsfc.nasa.gov           (Internet)
6170:::LANDSMAN                        (SPAN)

(301) - 286 - 3625

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