FFT software

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3 total messages Started by Adam Karpowicz Thu, 17 Dec 1992 01:29

#830

Author: Adam Karpowicz
Date: Thu, 17 Dec 1992 01:29

19 lines
1189 bytes

I am trying to find an inexpensive program capable of doing FFT on
images.  I take two digital images of laser speckle (or any other
random dots) on an object, one before and one after a small in-plane
translation, add both and then do FFT on an area of the added image.
Since there are two sets of identical, but slightly apart, speckle dots,
the FFT spectrum (in the form of dark fringes) can show the direction and
magnitude of the translation.

I do not want to invest a lot of money (usually ~$2000) for software
until I know if the method works for me. Is there a PD or shareware
to do FFT on images? 

I also hope to find someone doing something (even remotely) similar
to this.

Thanks in advance

Adam  akarpowicz@mta.ca

Re: FFT software

#833

Author: smith
Date: Thu, 17 Dec 1992 12:20

14 lines
1260 bytes

In article <1992Dec17.012938.23423@jupiter.sun.csd.unb.ca>, akarpowicz@mta.ca (Adam Karpowicz) writes:
> ....
> I do not want to invest a lot of money (usually ~$2000) for software
> until I know if the method works for me. Is there a PD or shareware
> to do FFT on images? 
> 
We have a FFT program set on this machine available via anonymous/FTP. We 
also have a progrma package that uses this which might do what you want. But 
it runs on VAXes and Ultrix DECstations.

+----------------------------------------------------------------------------+
|Ross Smith,  Research Computing Resource, Department of Cell Biology, NYU-MC|
|E-Mail:  SMITH@NYUMED.BITNET (BITNET),   SMITH@MCCLB0.MED.NYU.EDU (Internet)|
+----------------------------------------------------------------------------+

Re: FFT software

#740

Author: Joachim Glaubrecht #Alwd#
Date: Mon, 21 Dec 1992 10:17

21 lines
1409 bytes

>>> ....
>>> I do not want to invest a lot of money (usually ~$2000) for software
>>> until I know if the method works for me. Is there a PD or shareware
>>> to do FFT on images? 
>>> 
>>We have a FFT program set on this machine available via anonymous/FTP. 
>
>...

the KHOROS-Image-System (look in UseNets comp.soft-sys.khoros)
   ~~~~~~~~                             ~~~~~~~~~~~~~~~~~~~~~~
comes in c-source-code and has lots of transformations like FFT.
the FFT works on matrixes up to 2048x2048 and IS FAST!

we use it on Ultrix 4.2 Systems.

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