[Kst] [Bug 86659] command line option,
supress low frequency signal/noise
staikos at kde.org
Thu Aug 5 22:00:14 CEST 2004
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------- Additional Comments From staikos kde org 2004-08-05 22:00 -------
On Thursday 05 August 2004 15:54, William Jones wrote:
> Version: 0.82 (using KDE 2.2.2)
Wow that's old. Time to upgrade your Kst. :)
> It would be really nice if there was a way to suppress low frequency noise
> (or signal, if one is so lucky) from a data vector. This would be very
> helpful for visualizing small signals riding on large low frequency noise
> fluctuations. When viewing PSDs of real data, this option would obviate the
> frequent autoscaling problem, in which the interesting part of the spectrum
> is dwarfed by the noise at low frequencies.
> A command line option to implement the "Low Frequency Interference"
> subtraction would be very convenient. The argument of the option could be
> the highpass edge in, say, units of the resolution element, or in Hz (if
> the sample rate is supplied as well). For instance, the command line of
> this sort
> kst -lfi 2 -r 200
> would specify the sample rate (200 Hz), and the highpass edge of the filter
> required to overcome the low frequency noise in the data (2 Hz).
Could this be done with a plugin? Recent Kst releases support plugins
written in C. You can't quite reference them from the commandline, but they
should be able to provide this functionality I think.
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