Search All of the Math Forum:
Views expressed in these public forums are not endorsed by
NCTM or The Math Forum.


Torsten
Posts:
1,691
Registered:
11/8/10


Re: 3D Affine Transform
Posted:
Feb 27, 2013 3:48 AM


"fereshteh " <fe_a252525@yhoo.com> wrote in message <kgkcgc$d68$1@newscl01ah.mathworks.com>... > In a 3D Affine Transform ,I have two sets of 3D data((x,y,z):after applying transformation,(x0,y0,z0):before applying transformation(original data)),and now I want two obtain the 7parameters of 3D Affine Transform(the translation vector,scale factor and the elements of the orthogonal rotation matrix). > Any suggestion will be very helpful. > > Thanks > F.A
So what is the final form of affine transfomation you want to allow ? Usually in 3D, you will have to fit 12 instead of 7 parameters: x' = a11*x + a12*y + a13*z + a14 y' = a21*x + a22*y + a23*z + a24 z' = a31*x + a32*y + a33*z + a34
Best wishes Torsten.



