Create a warped grid for visualization. — createWarpedGrid • ANTsR

Deforming a grid is a helpful way to visualize a deformation field. This function enables a user to define the grid parameters and apply a deformable map to that grid.

createWarpedGrid(
  img,
  gridStep = 10,
  gridWidth = 2,
  gridDirections = c(TRUE, TRUE),
  fixedReferenceImage = NULL,
  transform = NA,
  foreground = 1,
  background = 0
)

Arguments

img: input image
gridStep: width of grid blocks
gridWidth: width of grid lines
gridDirections: directions in which to draw grid lines, boolean vector
fixedReferenceImage: reference image space
transform: vector of transforms
foreground: intensity value for grid blocks
background: intensity value for grid lines

Value

image is output

Author

Avants BB

Examples


fi <- antsImageRead(getANTsRData("r16"))
mi <- antsImageRead(getANTsRData("r64"))
mygr <- createWarpedGrid(mi)
if (FALSE) { # \dontrun{
mytx <- antsRegistration(fixed = fi, moving = mi, typeofTransform = c("SyN"))
mywarpedgrid <- createWarpedGrid(mi,
  gridDirections = c(F, T),
  transform = mytx$fwdtransforms, fixedReferenceImage = fi
)
plot(fi, mywarpedgrid, alpha = 0.75, color.overlay = "blue")
} # }