Education material for FFT on image

[William1]

Dear All,

Apart from the IMAQ manual, could anyone advise other sources of education / training material on how to apply FFT (not the maths behind it) on image to filter out (attenuate) noise component of an still image and help to make a fixed pattern more visible from background of random noise.

TIA

William

[ryanm]

Hi William,

National Instruments has several documents explaining FFT.  As far as how to apply this to an image, the Vision Development Module contains a function IMAQ FFT.vi, which allows you to input an image and compute the FFT.  If this function is causing you trouble, please let me know and I will be glad to help; however, if you are trying to build your own FFT function, the best help I can offer is http://zone.ni.com/devzone/conceptd.nsf/webmain/a61876074ae0b9918625684600522cf4.

Regards,

Ryan M.

Applications Engineer

National Instruments

[BruceAmmons]

Perhaps you could post a sample image.  FFT filtering may not be the best approach to removing the noise.

Bruce