Apply a transform list to map points from one domain to another

See ants$apply_transforms_to_points for more details. Please note point mapping goes the opposite direction of image mapping (see ants_apply_transforms), for both reasons of convention and engineering.

Usage

ants_apply_transforms_to_points(
  dim,
  points,
  transformlist,
  whichtoinvert = NULL,
  verbose = FALSE,
  ...
)

Arguments

dim

dimensions of the transformation

points

data frame containing columns 'x', 'y', 'z', 't' (depending on dim)

transformlist

list of strings (path to transforms) generated by ants_registration where each transform is a file name

whichtoinvert

either NULL, None ('Python'), or a vector of logical with same length as transformlist; print ants$apply_transforms_to_points to see detailed descriptions

verbose

whether to verbose application of transform

...

ignored

Value

Transformed points in data frame (R object)

See also

print(ants$apply_transforms_to_points)

Examples

if(interactive() && ants_available()) {
  ants <- load_ants()
  fixed <- as_ANTsImage( ants$get_ants_data('r16') )
  moving <- as_ANTsImage( ants$get_ants_data('r27') )

  reg <- ants_registration(
    fixed = fixed, moving = moving,
    type_of_transform = "antsRegistrationSyNRepro[a]")

  pts <- data.frame(
    x = c(128, 127),
    y = c(101, 111)
  )

  ptsw = ants_apply_transforms_to_points(2, pts, reg$fwdtransforms)
  ptsw
}