[ITK] [ITK-users] Finding Correspondence between Images using itkTransform

[Matt McCormick]

Hi Vikash,

The transform should be applied to the Fixed Image point instead of
the Moving Image point.

Hope this helps,
Matt

On Mon, Apr 7, 2014 at 6:08 PM, Vikash Gupta <vikash.gupta at inria.fr> wrote:
> Hi everyone,
> I have two images one fixed image and one moving image a I registered them
> and I have the transformation matrix in the ITK Transform format.
>
> I think, now if I take the index [0 0 0] and calculate the physical point
> associated with the index [0 0 0],i.e., the origin using
> moving_image->TransformIndexToPhysicalPoint( index, P0 ).
>
> My assumption is that if to this physical point P0, I apply the calculated
> transform using
> P1= transform->TransformPoint(P0)
>
> and then calculate the index associated with the transformed point P1, in
> the fixed image like,
> fixed_image->TransformPhysicalPointToIndex(P0, new_index)
>
> The new_index should be the origin for the fixed image,i.e., P0 should be
> the origin of the new image.
> But I am not getting the same results.
>
> Am I doing something wrong ?
>
> Thanks for any help
> Vikash
>
>
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