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Hi,
I would like to calibrate the ARToolKit with the Matlab Toolbox Calibration
(http://www.vision.caltech.edu/bouguetj/calib_doc). I know that some of
you already asked for it in this mailing list. However, there was not a
direct solution mentioned, until know. I tried to combine both, but
something isn=92t right:
Matlab delivers the following:
Focal Length: fc (2x1) the focal distance (a unique value in mm)
Principal point: cc (2x1)
Skew: alpha_c (1x1) angle between the x and y pixel axes (assume
to be 90=B0)
Distortion: kc (5x1) radial and tangential distortions
and defines the intrinsic matrix:
fc(0)=09alpha_c*fc(0) cc(0)
0=09 fc(1)=09 cc(1)
0=09 0=09=09 1
the ARToolKit uses the following Matrix (without taking into account the
skew):
param.mat :
Sx*f =090 X0
0 Sy*f Y0
0 =090 1
Then comes what I did :
the Matlab Parameter into the param.mat:
fc(0)=09 0 cc(0)
0=09 fc(1)=09 cc(1)
0=09 0=09=09 1
the distortion
param.dist_factor[0] =3D=09cc(0) //central point of distortion
param.dist_factor[1] =3D=09cc(1) //central point of distortion
param.dist_factor[2] =3D=09?;=09//coefficient of distortion
param.dist_factor[3] =3D ?; //ratio of distortion
I am not sure about the values, I've chosen and what to put for
param.dist_factor[2],[3]?
Thanks for any ideas!
Bj=F6rn
010325958301108764413=:21085
