[Insight-users] WarpImageFilter

[Kajetan Berlinger]

Hi,

what I would try first, is to initialize the displacement field with vectors = (0,0),
means no warping at all. Now after applying the filter to the image it certainly should still look 
like the original one (white ball). After this first test I would manually manipulate the 
displacement field to see how the filter reacts.

Hope that help,
Kaj


Michelangelo Paci wrote:
> Dear list,
> I'm trying to warp a very simple image, a white ball (intensity 255) in a
> black background (intensity 0), using a vector field of the same dimension,
> origin and spacing of the image. But the output of this filter is a totally
> black image, my white ball completely disappears. How could it be? I think
> that even if the displacement is very small, my ball should remain in the
> output image. Does the warper rescale also the intensities of the input
> image using the intensity of the displacement, or only moves each voxel? I
> need the vector field in order to move some elements in my image, but it's
> totally unuseful if it return an all black image.
> Please, help me, this is very important.
> 
> Thanks
> Michelangelo Paci
> 
> 
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