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Re: signal processing package for IDL [message #457 is a reply to message #456]

Thu, 30 July 1992 11:51

bhill
Messages: 2
Registered: July 1992

Junior Member

In article <1992Jul30.125624.3001@afterlife.ncsc.mil>, dpkemp@afterlife.ncsc.mil (David P. Kemp) writes...
> In article <14663@umd5.umd.edu> dmatthews@uap.umd.edu writes:
>> If you don't have to do your filtering in real time, do it in the
>> frequency domain, i.e. take the Fourier transform of the data,
> I'm certain it isn't faster.
> It may or may not be easier to understand.
> I don't believe it is even possible to do exactly.

My experience in astronomical image processing is that S/N has to be
very good before you can consider using FFT-based methods. With noisy
data, it's better to work in the domain of the data.

- Bob
------------------------------------------------------------ ------------
Robert S. Hill | Internet: BHILL@STARS.GSFC.NASA.GOV
Hughes STX Corp. | Phone: 301/286-3624
------------------------------------------------------------ ------------

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[Message index]

		Re: signal processing package for IDL By: greg on Wed, 19 August 1992 09:30
		Re: signal processing package for IDL By: jacobsen on Thu, 30 July 1992 18:13
		Re: signal processing package for IDL By: thompson on Thu, 30 July 1992 11:47
		Re: signal processing package for IDL By: bhill on Thu, 30 July 1992 11:51
		Re: signal processing package for IDL By: dpkemp on Thu, 30 July 1992 05:56
		Re: signal processing package for IDL By: kevin on Wed, 29 July 1992 15:10
		Re: signal processing package for IDL By: ritscher on Wed, 29 July 1992 06:53
		Re: signal processing package for IDL By: dmatthews on Sun, 26 July 1992 13:10
		Re: signal processing package for IDL By: dpkemp on Sat, 25 July 1992 07:23

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