FFT on image stack Question about cufft

[johsimr]

I have a quick question about cufft and I was wondering if anyone has a suggestion. I have an image stack of 512X512X500 (x,y,z) and I need to do an fft along the z axis (which is time). I am using the raw image format (index: x+Nxy+NxNy*z)

I would use the 1D cufft with the batch option but I spend to much time copying the data into the correct format to make it feasible. Does anyone have any suggestions?

Thanks
Joseph

[sleon]

I have a quick question about cufft and I was wondering if anyone has a suggestion.  I have an image stack of 512X512X500 (x,y,z) and I need to do an fft along the z axis (which is time).  I am using the raw image format (index: x+Nxy+NxNy*z)

I would use the 1D cufft with the batch option but I spend to much time copying the data into the correct format to make it feasible.  Does anyone have any suggestions?

Thanks

Joseph

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what is your question?

[johsimr]

what is your question?

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My question is how efficiently do an fft on the z dimension on the 3D image stack?

[StickGuy]

If you have enough memory available to have a second copy of your images around, I’d suggest transposing the images and running a batched FFT on the transposed images.

[johsimr]

If you have enough memory available to have a second copy of your images around, I’d suggest transposing the images and running a batched FFT on the transposed images.

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Thanks for the response! However I am not sure I get it. How can i transpose a 3d matrix to group the 3rd dimension such that I can use it with a batched fft?

I appreciate your help!

[johsimr]

I think I found the answer:
http://forums.nvidia.com/index.php?showtop…t=&#entry279919
I will give this a shot.