SimpleITK  1.3.0.dev466
ImageRegistrationMethod1/ImageRegistrationMethod1.R
#=========================================================================
#
# Copyright Insight Software Consortium
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0.txt
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
#=========================================================================
# Run with:
#
# Rscript --vanilla ImageRegistrationMethod1.R fixedImage movingImage outputTransform
#
library(SimpleITK)
commandIteration <- function(method)
{
msg <- paste("Optimizer iteration number ", method$GetOptimizerIteration(),
" = ", method$GetMetricValue(), " : ", method$GetOptimizerPosition(),
"\n" )
cat(msg)
}
args <- commandArgs( TRUE )
if (length(args) != 3) {
stop("3 arguments expected - FixedImage, MovingImage, TransformFilename")
}
fixed <- ReadImage(args[[1]], 'sitkFloat32')
moving <- ReadImage(args[[2]], 'sitkFloat32')
Reg = ImageRegistrationMethod()
Reg$SetMetricAsMeanSquares()
Reg$SetOptimizerAsRegularStepGradientDescent(4.0, .01, 200 )
Reg$SetInitialTransform(TranslationTransform(fixed$GetDimension()))
Reg$SetInterpolator('sitkLinear')
Reg$AddCommand('sitkIterationEvent', function() commandIteration(Reg))
outTx = Reg$Execute(fixed, moving)
WriteTransform(outTx, args[[3]])