🚀 go-pugleaf

In <9209011949.AA19843@hp-and.an.hp.com> susanm@hp-and.an.hp.com (Susan Margulies) writes:

>Basically, I am trying to come up with a way of visualizing the
>phase information as a function of position.  I am already
>displaying the magnitude information by mapping transform
>coefficients into grey scale information.  But since it is the phase
>information which is necessary (and sufficient) for image
>reconstruction, I would prefer to be studying the phase information.
>(I am doing graduate thesis research on image compression.)

One thing that you might want to take into account is that the Fourier
transform of an ordinary image is hermitic, ie if you do a transform
AxB real image -> AxB complex Fourier transform, you got quite some
redundancies.
Doing instead AxB image -> -(A/2+1)xB phase and (A/2+1)xB modulus
will give you a nicely viewable (and displayable) Fourier transform.
Also pseudocolor is no mean idea to display intensities ;-)

regards,
	spz
-- 
        spz is S.Petra Zeidler  Copyright 1992 S.Petra Zeidler
spz@specklec.mpifr-bonn.mpg.de  
 MPI fuer Radioastronomie Bonn  
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