how to extract noise using FFT

[luckyloic]

Hello

I am a new user in Labview and I have a signal to process. I want to extract the noise using the FFT function and then repass the image in the temporal field in order to draw the clean image. From my  output of the FFT I want to cutoff at about 250 Hz to retrieve all the frequencies before.

I use a butterworth filter but it does not work and I don't know how to fix it.

I have joined my output signal from the FFT and my VI. 

Please help...

Thanks

[Pcorcs]

Hello,

After looking at the VI , I am curious as to the use of the Spectral Measurements VI in the system, as it outputs are not wired? Could you also please describe or demonstrate the functionality that "does not work"?

As not all members may be intimately familiar with the image processing algorithm you are working to deploy, would it be possible to provide an example of a "good" filtered data set or image; such that, it may be contrast with a "bad" unfiltered image? Furthermore, could you describe the image you have posted, and how the filtering improves the final display?

I appreciate your time, and look forward to any additional information that you can provide.

Regards,