Usage: 3dNwarpFuncs [options]
This program reads in a nonlinear 3D warp (from 3dQwarp, etc.) and computes some functions of the displacements. See the OPTIONS below for information on what can be computed.
- -nwarp www = ‘www’ is the name of the 3D warp dataset
(this is a mandatory option!)++ This can be computed on the fly, as in 3dNwarpApply.
-prefix ppp = ‘ppp’ is the name of the new output dataset
- -bulk = Compute the (fractional) bulk volume change.
- ++ e.g., Jacobian determinant minus 1.
-shear = Compute the shear energy.
-vorticity = Compute the vorticity enerty.
If none of ‘-bulk’, ‘-shear’, or ‘-vorticity’ are given, then ‘-bulk’ will be assumed.
Define the Jacobian matrix by
[ 1+dp/dx dp/dy dp/dz ] [ Jxx Jxy Jxz ]
- J = [ dq/dx 1+dq/dy dq/dz ] = [ Jyx Jyy Jyz ]
- [ dr/dx dr/dy 1+dr/dz ] [ Jzx Jzy Jzz ]
++ Compile date = Dec 16 2015