[ITK-users] QuaternionRigidTransformGradientDescentOptimizer

[Matias Montroull]

Hi,

I'm doing 3D registration using QuaternionTransform and using the
QuaternionRigidGradientDescentOptimizer. Now, after registering the images,
the result is rotated abour 90 degrees. What's the best parameters for the
optimizer?

I'm using this:

optimizerScales[0] = 1.0;
optimizerScales[1] = 1.0;
optimizerScales[2] = 1.0;
optimizerScales[3] = 1.0;
optimizerScales[4] = 0.1;
optimizerScales[5] = 0.1;
optimizerScales[6] = 0.1;

I tried small scales but I get all mapped points outside image region so
I'm wondering if there's a good document describing how to use the
Quaternion Optimizer?

Thank you,

Matias.
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