These functions extract forward and reverse transformations in a form
compatible with applyTransform
and other functions. They are
(S3) generic, but only methods for "niftyreg"
objects currently
exist.
forward(object, ...)# S3 method for niftyreg
forward(object, i = 1, ...)
reverse(object, ...)
# S3 method for niftyreg
reverse(object, i = 1, ...)
An R object.
Additional arguments. Not currently used.
The transformation number to extract. There will only be more than one in the case of multiple registration.
A transformation object, an image or affine matrix, with suitable
attributes giving pointers to source and target images. If there is no
transformation information in the object then NULL
is returned.