One way is to convert your warp field to the coefficient format
using fnirtfileutils with "-f spline" and then calculate the Jacobian
from this using fnirtfileutils again with "-j". This should allow you
to calculate the Jacobian of any warp.
All the best,
On 8 Aug 2009, at 15:40, Mahinda Yogarajah wrote:
> Dear Experts,
> If one combines two warps a and b (using convertwarp) to derive a
> warp c,
> how does one obtain the jacobian field of warp c.