[MINC-users] xfm2param -scale option does not do anything

[Vladimir S. FONOV]

Hello,

indeed.... param2xfm -scale 0.2 0.2 0.00001 test_scale_2D.xfm works though

it might have something to do with the fact that affine transformation 
with scaling of zero is not invertible.

On 13-07-03 05:49 PM, Paul GRAVEL wrote:
> Dear All,
>
> There is probably a reason for that, but I want to create an xfm file
> with scaling parameters, but it does not seem to work, i.e. the scale
> parameters don't appear and I only get the identity transformation
> matrix as seen below.
>
> Any enlightenment would be appreciated!
>
> Best,
>
> Paul
> ________________________________________________
> This is what I did and obtained:
>
> % param2xfm -scales 0.2 0.2 0 test_scale_2D.xfm
>
> % xfm2param test_scale_2D.xfm
> after parameter extraction
> -center         0.00000    0.00000    0.00000
> -translation    0.00000    0.00000    0.00000
> -rotation       0.00000    0.00000    0.00000
> -scale          1.00000    1.00000    1.00000
> -shear          0.00000    0.00000    0.00000
>
> % cat test_scale_2D.xfm
> MNI Transform File
> %Wed Jul  3 17:46:00 2013>>> param2xfm -scales 0.2 0.2 0 test_scale_2D.xfm
> %(Package mni_autoreg 0.99.3, compiled by rotor at gack (i686-pc-cygwin) on
> Fri Nov  3 00:19:37 EST 2006)
>
> Transform_Type = Linear;
> Linear_Transform =
>   1 0 0 0
>   0 1 0 0
>   0 0 1 0;
>
>
>
>
>
>
> _______________________________________________
> MINC-users at bic.mni.mcgill.ca
> http://www.bic.mni.mcgill.ca/mailman/listinfo/minc-users


-- 
Best regards,

  Vladimir S. FONOV ~ vladimir.fonov <at> gmail.com