DeFreq plugin - Interference frequency remover

[Fizick]

I have 2 bad TV channels in my internal analog TV-tuner.

Now I make and release beta version of DeFreq plugin - Interference frequency remover

DeFreq spatial filter removes some frequencies from video frames.
It can be used for removal of interference frequency noise (regular inclined strips) from some TV capturing, and also for additional blurring.


Defreq uses Fast Fourier Transform method for frequency selecting an removing.
It is a spatial filter, and works as follows:
1) get frequency spectrum by forward FFT transform of frame image;
2) search some defined spectrum window (windows) for local maximum (extremum, most intense frequency);
3) remove frequencies at this sharp maximum from spectrum;
4) optional remove highest frequencies by low pass filter (for blurring, smoothing);
5) get output frame by inverse FFT transform of cleaned spectrum.

Defreq uses fast external FFTW library version 3 (http://www.fftw.org)
as Windows binary DLL (compiled with gcc under MinGW by Alessio Massaro),
which support for threads and have AMD K7 (3dNow!) support in addition to SSE/SSE2.
It may be downloaded from ftp://ftp.fftw.org/pub/fftw/fftw3win32mingw.zip
You MUST put FFTW3.DLL file from this package to some directory in path (for example, C:\WINNT).

Defreq will NOT work without it!

Try and post report!