// ********** Image Types

(FixedInternalImagePixelType "float")
(FixedImageDimension 3)
(MovingInternalImagePixelType "float")
(MovingImageDimension 3)


// ********** Components

(Registration "MultiResolutionRegistration")
(FixedImagePyramid "FixedRecursiveImagePyramid")
(MovingImagePyramid "MovingRecursiveImagePyramid")
(Interpolator "LinearInterpolator")
(Metric "AdvancedNormalizedCorrelation")
(Optimizer "AdaptiveStochasticGradientDescent")
(ResampleInterpolator "FinalBSplineInterpolator")
(Resampler "DefaultResampler")
(Transform "RecursiveBSplineTransform")


// ********** 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 50)

(AutomaticParameterEstimation "true")
(UseAdaptiveStepSizes "true")


// ********** Metric

// Just using the default values for the NC metric


// ********** Several

(WriteTransformParametersEachIteration "false")
(WriteTransformParametersEachResolution "true")
(WriteResultImageAfterEachResolution "false")
(WritePyramidImagesAfterEachResolution "false")
(WriteResultImage "true")
(ShowExactMetricValue "false")
(ErodeMask "false")
(UseDirectionCosines "true")


// ********** ImageSampler

//Number of spatial samples used to compute the mutual information in each resolution level:
(ImageSampler "RandomCoordinate")
(NumberOfSpatialSamples 2000)
(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)

