[ITK] [ITK-users] SC Registration

[Matias Montroull]

Thanks Bartlomiej, so if I have the set of Landmak Points, then I should
call let's say: FixedImage->TransformIndexToPhysicalPoint()?
Hi Matias,
You are right, not only the origin is important, but also the spacing and
the local orientation of the image. Instead of computing it, you should use
the function anImage->TransformIndexToPhysicalPoint().

As itkSoftwareBook mentions (vol. II, chap. 3.3), the "registration is done
in physical coordinations".

Regards,
Bartłomiej

W dniu 2015-06-15 o 19:20, Matias Montroull pisze:

> Hi comunity,
>
> I'm also working on this LandMark Registration example and can't align
> the two images.. The two set of points used for landmarks are extracted
> from another system and stored in a file then parsed into the example.
> Do I need to take into consideration the images origin to do LandMark
> Registration (that is, adding the origin to each point parsed? I noticed
> ITK may use this tag to calculate during registration..
>
> Matias.
>
> El lun., 15 de jun. de 2015 a la(s) 8:06 a. m., Bartłomiej Pyciński
> <bpycinski at polsl.pl <mailto:bpycinski at polsl.pl>> escribió:
>
>     Hi,
>     if you are fine with rigid body registration (no deformations, only
>     rotation and shift), then you may look at the
>     LandmarkBasedTransformInitializer example
>     (
> http://itk.org/Wiki/ITK/Examples/Registration/LandmarkBasedTransformInitializer
> ).
>     The transformation minimalizes the sum of squares of distances between
>     corresponding points.
>     Regards,
>     Bartłomiej
>
>     W dniu 2015-06-15 o 12:39, Carmine Pagliaro pisze:
>      > Hi all,
>      > i'm a new user, well sorry for my inexperience.
>      > I'm looking for a method that allow me to register two image
> starting
>      > from some points.
>      > Example: I've got two different mri image (image_a; image_b), I
>     set two
>      > points (p1_a; p2_a (in red in the image attached)) in the
>     image_a, then
>      > i set two points (p1_b; p2_b (in red in the image attached)) in the
>      > image_b. well my registration process have to align the two image
>      > considering align p1_a=p1_b (some location in the registered result
>      > image) & p2_a=p2_b.
>      >
>      > --
>      > Carmine Pagliaro
>      > /Life is for sharing./
>      >
>      >
>      >
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> --
> Matias
>
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