Resample image — ants_resample

See ants$resample_image for more details

Usage

ants_resample_image(
  x,
  resample_params,
  use_voxels = FALSE,
  interp_type = c("linear", "nn", "guassian", "sinc", "bspline")
)

Arguments

x: input image
resample_params: either relative number or absolute integers
use_voxels: whether the resample_params should be treated as new dimension use_voxels=TRUE, or the new dimension should be calculated based on current dimension and resample_params combined (use_voxels=FALSE then resample_params will be treated as relative number); default is FALSE
interp_type: interpolation type; either integer or character; see 'Usage' for available options

Value

Resampled image

Examples



if(interactive() && ants_available()) {
  ants <- load_ants()
  fi <- as_ANTsImage(ants$get_ants_data("r16"))

  # linear (interp_type = 0 or "linear)
  filin <- ants_resample_image(fi, c(50, 60), TRUE, "linear")

  # nearest neighbor (interp_type = 1 or "nn)
  finn <- ants_resample_image(fi, c(50, 60), TRUE, "nn")

  par(mfrow = c(1, 3), mar = c(0, 0, 0, 0))
  pal <- gray.colors(256, start = 0)

  image(fi[], asp = 1, axes = FALSE,
        ylim = c(1,0), col = pal)
  image(filin[], asp = 1, axes = FALSE,
        ylim = c(1,0), col = pal)
  image(finn[], asp = 1, axes = FALSE,
        ylim = c(1,0), col = pal)
}