Hi all,
What’s the easiest way to get the 2D DFT of an image? I can take care
of zero- or mean-padding via RMagick easily enough, and I presume
ImageMagick uses the DFT internally to implement convolutions, but I
can’t see any easy way to get at the frequency data itself… Am I
missing something, or am I going to have to marshall the pixel data from
RMagick to NArray (or gsl, or…) manually? In that case, what’s the
most efficient path?
I presume this is something that others deal with on a daily basis, but
I’ve never had to tackle it from Ruby before.
Thanks,