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Topic:
fkfilter, velocity filter, frequencywavenumber filter
Replies:
9
Last Post:
Mar 12, 2010 4:44 PM




Re: fkfilter, velocity filter, frequencywavenumber filter
Posted:
Mar 11, 2010 11:02 AM


On 11 Mar, 16:47, "Hans " <te...@gmx.com> wrote: > That would mean for me the need to look deeper into the way, how a 2D Filter is defined in Matlab.
There is no such thing as a '2D filter' in matlab. Only matrices. You are looking for something as simple as
y = real(ifft2(fft2(x).*H));
where x is your timespace data, H is your fk filter, and y is the filtered data.
The 'hard' part is to fill in the numbers in H. You can do that in a couple of minutes, once you have some sort of idea what you want the filter to do.
Coming up with that idea is hard, though, as it requires you to actually contemplate what you are up to, rather than fiddling with readymade software routines.
Rune



