11-10-2008 08:40 AM
11-10-2008 10:23 AM
You need to convert your image to a 2D array of DBL. The FFT function (from the signal processing...transforms palette) accepts such 2D arrays.
Check the LabVIEW help.
(If you have a color image, you probably need to do it for each color component. What is the reason you want to take an FFT?)
11-10-2008 10:32 AM - edited 11-10-2008 10:35 AM
altenbach wrote:...
(If you have a color image, you probably need to do it for each color component. What is the reason you want to take an FFT?)
I don't have much to add to what Christian wrote but I can still share the following.
I have heard that Something like Wavelet transforms are being used for video compression (work weel for all but hockey games since the Wavelets have to change too often).
I converted a color image to grey-scale before filtering it with good results.
Ben
11-10-2008 10:42 AM
There is an old discussion here where an image contains regular ridges at a certain angle and a 2D FFT would give the periodicity and direction.
I cannot find this discussion at the moment. Anyone remember where that was?
11-10-2008 11:10 AM
03-07-2009 04:10 AM
03-09-2009 11:03 AM - edited 03-09-2009 11:04 AM
double click the llb, double click FFT madness RUNME.vi. run it. push the green question mark button for help.
I'm not sure if the 8.0 version will work properly, but the 8.6 version is fine.
-root