-h | Help, prints usage message. |
-o | Output file name for affine transform. |
-I | Maximum number of iterations. |
-N | Don't weight using normals. |
-M | Minimum distance weight, range [0.0-1.0]: Useful values are 0.25 (default) for global matching and 0.0 for local matching.. |
-E | Tolerance in the mean registration metric value. |
-i | Initial affine transform object. |
-g | Use maximal gradient contours. |
-a | Find the general affine transform. |
-r | Find the rigid body (aka registration) transform, default. |
-t | Find the translation only transform. |