Get voxel coordination by using imwarp

How can I get the coordination of the voxel by using the imwarp function?

I have image volume and applied by the imwarp. The result was return only the image volume but I would like to get the coordination of each voxel.

Answer 1

[Himanshu]

Hi,

I see that you are trying to obtain voxel coordinates after applying the "imwarp" function to an image volume.

The "imwarp" function transforms an image volume but does not directly provide the voxel coordinates. You can achieve this by following these steps:

• Create a grid of coordinates for the original image volume using "ndgrid".
• Apply the same geometric transformation to these coordinates using the "transformPointsForward" method.
• Use the transformed coordinates to map the voxel locations.

Please refer to the below documentations for more information.

1. Apply geometric transformation to image: https://www.mathworks.com/help/images/ref/imwarp.html
2. 3-D affine geometric transformation: https://www.mathworks.com/help/images/ref/affinetform3d.html
3. Apply forward geometric transformation: https://www.mathworks.com/help/images/ref/affinetform2d.transformpointsforward.html
4. Rectangular grid in N-D space: https://www.mathworks.com/help/matlab/ref/ndgrid.html

I hope this helps.

[AniCnx]

Thank you.