[Insight-users] Smoothing Vector Images

[Bill Lorensen]

First question: are you building ITK and your app with Release?

On Tue, Jun 15, 2010 at 11:34 AM, Merrem, Andreas
<andreas.merrem at medma.uni-heidelberg.de> wrote:
> Hi Luis, hi everyone,
>
> I am trying to smooth 3D image volumes of size 256 * 256 * 22 pixels, in
> which each pixel contains a 3 dimensional itk::CovariantVector. The vector
> components should be smoothed independently over the whole volume. My
> current solution is to first copy the 3 vector components in each pixel into
> 3 separate images with pixel type float, then use the
> itk::RecursiveGaussianImageFilter for smoothing on all 3 images, and finally
> copy the pixel values of the smoothed images back into the covariant vector
> image.
>
> My problem is that this procedure takes about one second. As a part of a
> registration program, this leads to extremely slow registration (about 10
> minutes for one 256*256*22 dicom volume). Is there a way to use less memory
> by avoiding the copying, or do you know a different, faster technique of
> applying a Gaussian filter?
>
> Thanks a lot,
>
> Andreas
>
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