Generate a deformable map from basis

Source: R/randomImageTransformAugmentation.R

The function will generate a deformable transformation (via exponential map) from a basis of deformations.

basisWarp(
  deformationBasis,
  betaParameters,
  numberOfCompositions = 2,
  spatialSmoothing = 0
)

Arguments

deformationBasis

list containing deformationBasis set
betaParameters

vector containing deformationBasis set parameters
numberOfCompositions

integer greater than or equal to one
spatialSmoothing

spatial smoothing for generated deformation

Value

list of fields

See also

randomImageTransformParametersBatchGenerator

Author

Avants BB

Examples

if (FALSE) {
library( ANTsR )
i1 = ri( 1 ) %>% resampleImage( 4 )
i2 = ri( 2 ) %>% resampleImage( 4 )
reg = antsRegistration( i1, i2, 'SyN' )
w =  composeTransformsToField( i1, reg$fwd )
bw = basisWarp( list( w, w ), c( 0.25, 0.25 ), 2, 0 )
bwApp = applyAntsrTransformToImage( bw, i2, i1 )
bw = basisWarp( list( w, w ), c( 0.25, 0.25 )*(-1.0), 2, 0 ) # inverse
bwApp = applyAntsrTransformToImage( bw, i1, i2 )
}