[vtkusers] vtkImageShrink3D

[David Gobbi]

Hi Rodrigo,

The shrink factor must be an integer.  A block of input voxels are
combined together to create each output voxel.  You can select
whether the output voxel is set to mean, median, maximum, or
minimum of the input voxels.  Or, you can use AveragingOff() to
simply decimate the image (i.e. to use nearest-neighbor).

For VTK 5.10, I wrote a replacement called vtkImageResize.
This new filter will, by default, perform band-limited sinc interpolation
on the image.  In other words, it will blur the image just enough
to avoid aliasing artifacts, which minimizes the data loss.

 - David


On Tue, Dec 4, 2012 at 1:58 PM, Rodrigo Lovera <lobo.theslayer at gmail.com> wrote:
> Hello everyone,
>
> I was wondering how does exactly the vtkImageShrink3D works? I know it
> sub-samples an image, in my case I used it for a volume, but does anyone
> know exactly how does exactly works and about the factor of data lose when
> you apply these?
>
>
> Regards,
>
> --
> Rodrigo