invert transform a mesh

[S Arbabi]

Hi,

I am aligning a mesh to reference as follows:

val transform = LandmarkRegistration.similarity3DLandmarkRegistration(correspondences, center = Point(0, 0, 0))
            val transformed = movingMesh.transform(transform)

and then I bring in correspondence with reference.

now I want to take the shape to its original location.
I'm wondering how I can do this by doing a reverse transform?

Best regards,
Saeed

[Marcel Luethi]

HI Saeed

The transformation that you get should have the method invert, which computes the inverse function:

http://unibas-gravis.github.io/scalismo/latest/api/scalismo/transformations/CanInvert.html

Another option is to just switch the order of the landmarks and compute a new transformation.

Best regards,

Marcel

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[S Arbabi]

Hi Marcel,

Now I want to write the transformation on disk, how can I do so? And then how can I load it?

Best regards,

Saeed

[Marcel Luethi]

Hi Saeed

Scalismo currently does not offer functionality to save and load transformations. You can, however, just store the landmark pairs and compute the transforms everytime from scratch. The computation is super fast.

Best regards,

Marcel

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