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// ********** Image Types
(FixedInternalImagePixelType "float")
(FixedImageDimension 3)
(MovingInternalImagePixelType "float")
(MovingImageDimension 3)
// ********** Components
(Registration "MultiResolutionRegistration")
(FixedImagePyramid "FixedRecursiveImagePyramid")
(MovingImagePyramid "MovingRecursiveImagePyramid")
(Interpolator "BSplineInterpolator")
(Metric "NormalizedMutualInformation")
(Optimizer "AdaptiveStochasticGradientDescent")
(ResampleInterpolator "FinalBSplineInterpolator")
(Resampler "DefaultResampler")
(Transform "BSplineTransform")
// ********** Pyramid
// Total number of resolutions
(NumberOfResolutions 3)
(ImagePyramidSchedule 4 4 4 2 2 2 1 1 1)
// ********** Transform
(FinalGridSpacingInPhysicalUnits 10.0 10.0 10.0)
(GridSpacingSchedule 4.0 2.0 1.0)
(HowToCombineTransforms "Compose")
// ********** Optimizer
// Maximum number of iterations in each resolution level:
(MaximumNumberOfIterations 100)
// For fast testing:
(NumberOfJacobianMeasurements 2500 5000 10000)
(AutomaticParameterEstimation "true")
(UseAdaptiveStepSizes "true")
// ********** Metric
(NumberOfHistogramBins 32)
(FixedKernelBSplineOrder 0)
(MovingKernelBSplineOrder 3)
// ********** Several
(WriteTransformParametersEachIteration "false")
(WriteTransformParametersEachResolution "true")
(WriteResultImageAfterEachResolution "false")
(WritePyramidImagesAfterEachResolution "false")
(WriteResultImage "false")
(ShowExactMetricValue "false")
(ErodeMask "false")
(UseDirectionCosines "true")
// ********** ImageSampler
//Number of spatial samples used to compute the mutual information in each resolution level:
(ImageSampler "RandomCoordinate")
(NumberOfSpatialSamples 500)
(NewSamplesEveryIteration "true")
(UseRandomSampleRegion "false")
//(SampleRegionSize 50.0 50.0 50.0)
(MaximumNumberOfSamplingAttempts 5)
// ********** Interpolator and Resampler
//Order of B-Spline interpolation used in each resolution level:
(BSplineInterpolationOrder 1)
//Order of B-Spline interpolation used for applying the final deformation:
(FinalBSplineInterpolationOrder 3)
//Default pixel value for pixels that come from outside the picture:
(DefaultPixelValue 0)
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