[MINC-users] xfmavg and lsq6 transforms

[Gabriel A. Devenyi]

And the average I get, cause I forgot to include it:

MNI Transform File
%
% Created by xfmavg with a bit of help from octave
%    http://www.octave.org/
%
% Thu Feb 11 10:47:59 EST 2016>>>> xfmavg scan1_01a0_GenericAffine.xfm
scan1_02a0_GenericAffine.xfm scan1_02b0_GenericAffine.xfm
scan1_03a0_GenericAffine.xfm scan1_04a0_GenericAffine.xfm
scan1_05a0_GenericAffine.xfm scan1_05b0_GenericAffine.xfm
scan1_06a0_GenericAffine.xfm scan1_07a0_GenericAffine.xfm
scan1_07b0_GenericAffine.xfm scan1_08b0_GenericAffine.xfm
scan1_10b0_GenericAffine.xfm scan1_11b0_GenericAffine.xfm
scan1_12a0_GenericAffine.xfm scan1_13a0_GenericAffine.xfm
scan1_14a0_GenericAffine.xfm scan1_14b0_GenericAffine.xfm
scan1_16b0_GenericAffine.xfm scan2_01a0_GenericAffine.xfm
scan2_01b0_GenericAffine.xfm scan2_02a0_GenericAffine.xfm
scan2_03a0_GenericAffine.xfm scan2_06a0_GenericAffine.xfm
scan2_06b0_GenericAffine.xfm scan2_08a0_GenericAffine.xfm
scan2_09a0_GenericAffine.xfm scan2_11a0_GenericAffine.xfm
scan3_02a0_GenericAffine.xfm scan3_03a0_GenericAffine.xfm
scan3_07a0_GenericAffine.xfm scan3_09a0_GenericAffine.xfm
scan3_09b0_GenericAffine.xfm average/average.xfm

Transform_Type = Linear;
Linear_Transform =
 9.99871671e-01 1.10030065e-02 1.16437239e-02 3.82880856e-01
 -1.10121374e-02 9.99939105e-01 7.20365393e-04 5.07116829e-01
 -1.16350887e-02 -8.48495237e-04 9.99931950e-01 5.22949707e-01;

​

-- 
Gabriel A. Devenyi B.Eng. Ph.D.
Research Computing Associate
Computational Brain Anatomy Laboratory
Cerebral Imaging Center
Douglas Mental Health University Institute
McGill University
t: 514.761.6131x4781
e: gdevenyi at gmail.com

On Thu, Feb 11, 2016 at 11:40 AM, Gabriel A. Devenyi <gdevenyi at gmail.com>
wrote:

> https://www.dropbox.com/s/vk9zzile5ox7pu4/transforms.tar.bz2?dl=0
>
> --
> Gabriel A. Devenyi B.Eng. Ph.D.
> Research Computing Associate
> Computational Brain Anatomy Laboratory
> Cerebral Imaging Center
> Douglas Mental Health University Institute
> McGill University
> t: 514.761.6131x4781
> e: gdevenyi at gmail.com
>
> On Thu, Feb 11, 2016 at 11:33 AM, Vladimir S. FONOV <
> vladimir.fonov at gmail.com> wrote:
>
>> Maybe it would be easier if you would make all xfms available...
>>
>>
>> On 16-02-11 10:55 AM, Gabriel A. Devenyi wrote:
>>
>>> Sure, easiest to expose with xfm2param:
>>>
>>> #One of 32 transforms
>>>
>>>> xfm2param input1.xfm
>>>>
>>> after parameter extraction
>>> -center         0.00000    0.00000    0.00000
>>> -translation    0.70513    0.30790    0.66079
>>> -rotation     -87.58608    4.54388    2.03792
>>> -scale          1.00000    1.00000    1.00000
>>> -shear         -0.00000   -0.00000    0.00000
>>>
>>> #Transforms have rotations in range 83-92 -6-7 -2 4
>>>
>>>> xfmavg *.xfm average.xfm
>>>> xfm2param average.xfm
>>>>
>>> after parameter extraction
>>> -center         0.00000    0.00000    0.00000
>>> -translation    0.38288    0.50712    0.52295
>>> -rotation      -0.04862    0.66666   -0.63100
>>> -scale          1.00000    1.00000    1.00000
>>> -shear         -0.00000   -0.00000    0.00000
>>>
>>> #Rotations have been completely lost
>>>
>>> I just realized this may be due to the values since they’re near -90,
>>> could
>>> this be a problem?
>>> ​
>>>
>>>
>>
>> --
>> Best regards,
>>
>>  Vladimir S. FONOV ~ vladimir.fonov <at> gmail.com
>> _______________________________________________
>> MINC-users at bic.mni.mcgill.ca
>> http://www.bic.mni.mcgill.ca/mailman/listinfo/minc-users
>>
>
>