Why I have to transpose the FFT before I mask on the FFT?

[lolkc2]

I am doing a program for image processing and I refer some program in the forum the FFT is been transposed before it mask with the ROI that is drawn. Besides that, the image mask is connected to the IMAQ Xor. I have try not to xor the image mask and mask the FFT that is not transposed. However it does work? Can I know the reason why the FFT have to be transposed before going through the masking?

[Bob_Schor]

Who can say?  How about posting a reference to the code you are talking about?  It is really difficult (some would say "impossible") to comment on code that we can'[t see (unless, perhaps, we wrote it, but how can we tell if we are the author of the original post?).

Bob Schor

[lolkc2]

Here is the vi file. Please have a look on it. Thanks.

[Bob_Schor]

Wow.  What a mess.  it utilizes one of my all-time favorite LabVIEW "Red Flag" structures, the Stacked Frame (ugh!), has no documentation, seems to dispose of the data while it is being used, etc.  I'm guessing the Original Poster had a question/problem that was not solved, suggesting that this code was "broken" -- presenting it again out of context is asking for more effort than I am willing to spend right now (I'm about to be introduced, I hope, to LabVIEW 2015 ...).

BS