how to get corresponding landmarks using existing BSpline deformation grid

[RossoneriMaldini]

Thanks for sharing! We want to apply existing BSpline deformation grid to some landmarks of source image, how can we get corresponding points after this deformation grid.

[keppenhof]

You can apply a transformation to points by calling the transform object like a function. Assuming your points are in x, and your image in im,

t = gryds.BSplineTransformation(your_grid)
y = t.transform(x, scale=im.shape)

will put the transformed points in y

The image shape is necessary here because the transformation object needs to know where to place the control points.