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questions about IMAQ for processing of image

Hi all

I am working with IMAQ image processing. I nedd get FFT of image, and from this get the magnitude and phase of this image....however, i don't know very about of IMAQ processing image. I started doing the next:  first IMAQ create, for start a process, after I use image to complex plane, and after I use FFT IMAQ for to obtain a FFT of image.... My image is on the desk  of my pc, and I think that some pin call" source" is for calling a image... however I don't understand  very well how do this... I need obtain a FFT of the image and obtain magnitude and phase.. I attached my vi, this only is for describe my idea,  given that my VI is very  large because have others things ...Please help me..I don't understand very well... The pin "plane" of  image to complex plane,for that is used?

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