[ITK-users] Pointset registration

[Dženan Zukić]

One possible reason for lousy result are duplicate points. Can you replace
all this duplication with one more good point (so you have 5)?

On Wed, Nov 11, 2015 at 4:57 PM, Matias Montroull <matimontg at gmail.com>
wrote:

> 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
>> >>>>>>>>
>> >>>>>>>> _____________________________________
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>> >>>>>>>
>> >>>>>> --
>> >>>>>> Matias
>> >>>>>
>> >>>>>
>> >>>> --
>> >>>> Matias
>> >>>
>> >>> --
>> >>> Matias
>> >>
>> >>
>> > --
>> > Matias
>> >
>> > _____________________________________
>> > Powered by www.kitware.com
>> >
>> > Visit other Kitware open-source projects at
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>> >
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>>
> --
> Matias
>
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