SimpleITK  1.3.0.dev466
ImageRegistrationMethod4/ImageRegistrationMethod4.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 ImageRegistrationMethod4.R fixedImageFilter movingImageFile outputTransformFile numberOfBins samplingPercentage
#
library(SimpleITK)
commandIteration <- function(method)
{
msg <- paste(method$GetOptimizerIteration(), "=",
method$GetMetricValue(), ":",
method$GetOptimizerPosition(), "\n" )
cat(msg)
}
args <- commandArgs( TRUE )
if (length(args) < 3) {
stop("3, 4, or 5 arguments expected - fixedImageFilter, movingImageFile, outputTransformFile [numberOfBins] [samplingPercentage]")
}
fixed <- ReadImage(args[[1]], 'sitkFloat32')
moving <- ReadImage(args[[2]], 'sitkFloat32')
numberOfBins <- 24
samplingPercentage <- 0.10
if (length(args) > 4) {
numberOfBins <- strtoi(args[[4]])
}
if (length(args) > 5) {
samplingPercentage <- as.numeric(args[[5]])
}
R <- ImageRegistrationMethod()
R$SetMetricAsMattesMutualInformation(numberOfBins)
R$SetMetricSamplingPercentage(samplingPercentage)
R$SetMetricSamplingStrategy('RANDOM')
R$SetOptimizerAsRegularStepGradientDescent(1.0,.001,200)
R$SetInitialTransform(TranslationTransform(fixed$GetDimension()))
R$SetInterpolator('sitkLinear')
R$AddCommand( 'sitkIterationEvent', function() commandIteration(R) )
outTx <- R$Execute(fixed, moving)
cat("-------\n")
outTx
cat("Optimizer stop condition:", R$GetOptimizerStopConditionDescription(), '\n')
cat("Iteration:", R$GetOptimizerIteration(), '\n')
cat("Metric value:", R$GetMetricValue(), '\n')
WriteTransform(outTx, args[[3]])