[Insight-users] speed of itk cross correlation vs matlab

[Daniel Blezek]

On 5/24/11 6:55 PM, "jimmylovesni" <jimmylovesni at gmail.com> wrote:

> 
> hello
> before i get started trying ITK, i want to know if it will be any faster
> than matlab. I am doing 3D cross correlations ((2 photon image z stacks)
> which take 2-3 days to process in matlab for the areas I am searching. What
> kind of ballpark comparable speeds will i see with ITK?
> thanks
> Jim

Are your images huge?  I'd speculate that you are doing the
cross-correlations in image space, it might be beneficial to do them in the
Fourier domain.  Typically there is a cross-over point where using an FFT is
faster.

-dan


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Daniel Blezek, PhD
Medical Imaging Informatics Innovation Center

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