[ITK] affine transform parameters

[samah bouzidi]

Hi,

I am running an Affine transform registration in 3D (using this example
http://itk.org/Wiki/ITK/Examples/Registration/ImageRegistrationMethodAffine).
I obtain 12 final parameters as : [ a b c d e f g h i j k l] assuming that
j, k,l are the translation parameters where are the rotation parameters
and how can I obtain the rotation angle ?
my intial parameters are :
R= [100
      010
     001]
and
tx=1
ty=1
tz=1
Thank you so much for your help,
Samah
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