[ITK-users] [ITK] Pointset registration

Wed Nov 11 17:15:39 EST 2015

Thanks, it is indeed the case you describe.. Is there an ITK example I can
use as reference to implement the landmarkbasedtransform?
Matias.

El mié., 11 de nov. de 2015 a la(s) 7:09 p. m., Andras Lasso <
lasso at queensu.ca> escribió:

> It seems that you want to do a simple landmark registration (you touch
> exactly the same points with the stylus, in the same order, as you defined
> in the image). If this is the case, then you should not use ICP but
> itk::LandmarkBasedTransformInitializer (with optional preprocessing step
> to determine the scale), as it is done in this Slicer module:
>
>
> https://github.com/Slicer/Slicer/blob/master/Modules/CLI/FiducialRegistration/FiducialRegistration.cxx
>
>
>
> Andras
>
>
>
>
>
> *From:* Community [mailto:community-bounces at itk.org] *On Behalf Of *Matias
> Montroull
> *Sent:* Wednesday, November 11, 2015 4:58 PM
> *To:* Matt McCormick <matt.mccormick at kitware.com>
> *Cc:* insight-users at itk.org Users <insight-users at itk.org>
> *Subject:* Re: [ITK] [ITK-users] Pointset registration
>
>
>
> Yes, here it goes..
>
>
>
> you will notice there are points that I had to repeat, the original
> dataset was 4 points on each file and I was getting warnings: * Number of
> unknowns(12) greater than number of data (4)*
>
>
>
> "puntosfijos.txt" is the fixed pointsets
>
> "puntosflotantes.txt" is the moving pointset..
>
>
>
> Thanks for your help.
>
>
>
> Matias.
>
>
>
> El mié., 11 de nov. de 2015 a la(s) 6:43 p. m., Matt McCormick <
> matt.mccormick at kitware.com> escribió:
>
> Hi Matias,
>
> Can the datasets be shared?
>
> Thanks,
> Matt
>
> On Wed, Nov 11, 2015 at 4:38 PM, Matias Montroull <matimontg at gmail.com>
> wrote:
> > Thanks.
> >
> > Here's another question, it seems I need 12 points to perform the
> > registration and obtain the matrix, now, the results I'm getting are not
> > very good. We have the algorithm programmed manually (not using ITK) and
> > when we compare the results are different (way too different).
> > I just pulled the example and modified to 3 dimensions and changed the
> > translationtransform to an affine transform. Is there an example using
> > Affine that I can check? I'm thinking is not just changing the transform,
> > there may be other variables I need to tweak..
> > Matias.
> >
> > El mié., 11 de nov. de 2015 a la(s) 5:51 p. m., Dženan Zukić
> > <dzenanz at gmail.com> escribió:
> >>
> >> Nowhere, which means it's the >> operator's standard white-space
> >> separators (spaces, tabs, newlines).
> >>
> >> On Wed, Nov 11, 2015 at 3:03 PM, Matias Montroull <matimontg at gmail.com>
> >> wrote:
> >>>
> >>> by the way, where in the code is the space separator specified?
> >>>
> >>> El mié., 11 de nov. de 2015 a la(s) 5:02 p. m., Matias Montroull
> >>> <matimontg at gmail.com> escribió:
> >>>>
> >>>> that worked! Thanks for the advise, I was under the impression that
> >>>> points needed to be separated by ";"
> >>>> Thanks again
> >>>>
> >>>> El mié., 11 de nov. de 2015 a la(s) 5:00 p. m., Dženan Zukić
> >>>> <dzenanz at gmail.com> escribió:
> >>>>>
> >>>>> By looking at the code, the numbers should be separated by space, not
> >>>>> semicolon. Can you try that?
> >>>>>
> >>>>> HTH
> >>>>>
> >>>>> On Wed, Nov 11, 2015 at 2:51 PM, Matias Montroull <
> matimontg at gmail.com>
> >>>>> wrote:
> >>>>>>
> >>>>>> Hi Dženan, thanks for the suggestion, I tried that example and I
> think
> >>>>>> I'm missign something as my disk drive became crazy.
> >>>>>> I basically created 2 txt files with a set of 4 points each in this
> >>>>>> format:
> >>>>>> -0.585938;92.406328;38.200
> >>>>>> 44.7654;52.73442;61.000
> >>>>>> -53.5;49.218792;68.200
> >>>>>> -1.757814;81.445382;70.600
> >>>>>>
> >>>>>> second file has the same format but different numbers of course.
> >>>>>>
> >>>>>> Is there anything wrong with how I entered the point sets in both
> >>>>>> files?
> >>>>>>
> >>>>>> As you can see it is 3 points per line separated by this character
> ";"
> >>>>>>
> >>>>>> Thanks,
> >>>>>>
> >>>>>> Matias.
> >>>>>>
> >>>>>>
> >>>>>> El mar., 10 de nov. de 2015 a la(s) 6:16 p. m., Dženan Zukić
> >>>>>> <dzenanz at gmail.com> escribió:
> >>>>>>>
> >>>>>>> Have you seen these two examples:
> >>>>>>>
> >>>>>>>
> http://www.itk.org/Doxygen/html/Examples_2RegistrationITKv3_2IterativeClosestPoint3_8cxx-example.html
> >>>>>>>
> >>>>>>>
> http://www.itk.org/Doxygen/html/Examples_2RegistrationITKv4_2IterativeClosestPoint3_8cxx-example.html
> >>>>>>>
> >>>>>>> HTH
> >>>>>>>
> >>>>>>> On Tue, Nov 10, 2015 at 3:18 PM, Matias Montroull
> >>>>>>> <matimontg at gmail.com> wrote:
> >>>>>>>>
> >>>>>>>> Hi,
> >>>>>>>>
> >>>>>>>> I have 2 sets of points (one is points on an image and another one
> >>>>>>>> is points on a NDI tracker) and I need to obtain the
> transformation matrix.
> >>>>>>>> What would be the best method? I'm currently using a Solver but
> I'd like to
> >>>>>>>> implement this using ITK and better if it is SimpleITK.
> >>>>>>>>
> >>>>>>>> Thank you!
> >>>>>>>>
> >>>>>>>> Matias.
> >>>>>>>> --
> >>>>>>>> Matias
> >>>>>>>>
> >>>>>>>> _____________________________________
> >>>>>>>> Powered by www.kitware.com
> >>>>>>>>
> >>>>>>>> Visit other Kitware open-source projects at
> >>>>>>>> http://www.kitware.com/opensource/opensource.html
> >>>>>>>>
> >>>>>>>> Kitware offers ITK Training Courses, for more information visit:
> >>>>>>>> http://www.kitware.com/products/protraining.php
> >>>>>>>>
> >>>>>>>> Please keep messages on-topic and check the ITK FAQ at:
> >>>>>>>> http://www.itk.org/Wiki/ITK_FAQ
> >>>>>>>>
> >>>>>>>> Follow this link to subscribe/unsubscribe:
> >>>>>>>> http://public.kitware.com/mailman/listinfo/insight-users
> >>>>>>>>
> >>>>>>>
> >>>>>> --
> >>>>>> Matias
> >>>>>
> >>>>>
> >>>> --
> >>>> Matias
> >>>
> >>> --
> >>> Matias
> >>
> >>
> > --
> > Matias
> >
> > _____________________________________
> > Powered by www.kitware.com
> >
> > Visit other Kitware open-source projects at
> > http://www.kitware.com/opensource/opensource.html
> >
> > Kitware offers ITK Training Courses, for more information visit:
> > http://www.kitware.com/products/protraining.php
> >
> > Please keep messages on-topic and check the ITK FAQ at:
> > http://www.itk.org/Wiki/ITK_FAQ
> >
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> >
>
> --
>
> Matias
>
-- 
Matias
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