Create a warped grid for visualization.

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) {
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' )
}