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#include "itkImage.h"
#include "itkTransform.h"
#include "itkCompositeTransform.h"
#include "itkantsReadWriteTransform.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkBSplineTransform.h"
#include <vcl_compiler.h>
#include <iostream>
#include <algorithm>
#include "antsUtilities.h"
namespace ants
{
template <unsigned int VImageDimension>
int
compareTransforms(const typename itk::Transform<double, VImageDimension, VImageDimension>::Pointer & firstTransform,
const typename itk::Transform<double, VImageDimension, VImageDimension>::Pointer & secondTransform)
{
using CompositeTransformType = typename itk::CompositeTransform<double, VImageDimension>;
using RealType = typename CompositeTransformType::ScalarType;
using DisplacementFieldTransformType = typename itk::DisplacementFieldTransform<RealType, VImageDimension>;
using DisplacementFieldType = typename DisplacementFieldTransformType::DisplacementFieldType;
const std::string CompositeTransformID("CompositeTransform");
if (firstTransform->GetNameOfClass() == CompositeTransformID &&
secondTransform->GetNameOfClass() == CompositeTransformID)
{
std::cout << "The input transforms are composite transform types." << std::endl;
const typename CompositeTransformType::ConstPointer Comp1 =
dynamic_cast<const itk::CompositeTransform<double, VImageDimension> *>(firstTransform.GetPointer());
const typename CompositeTransformType::ConstPointer Comp2 =
dynamic_cast<const itk::CompositeTransform<double, VImageDimension> *>(secondTransform.GetPointer());
if (Comp1->GetNumberOfTransforms() == Comp2->GetNumberOfTransforms())
{
const float coordinateTolerance = 1e-0;
const unsigned int N = Comp1->GetNumberOfTransforms();
for (unsigned int i = 0; i < N; ++i)
{
if (Comp1->GetNthTransform(i)->GetNameOfClass() == Comp2->GetNthTransform(i)->GetNameOfClass())
{
if (strcmp(Comp1->GetNthTransform(i)->GetNameOfClass(), "DisplacementFieldTransform"))
{
if (!Comp1->GetNthTransform(i)->GetFixedParameters().is_equal(
Comp2->GetNthTransform(i)->GetFixedParameters(), coordinateTolerance) ||
!Comp1->GetNthTransform(i)->GetParameters().is_equal(Comp2->GetNthTransform(i)->GetParameters(),
coordinateTolerance))
{
std::cerr << i << ": " << std::endl;
std::cerr << Comp1->GetNthTransform(i)->GetParameters() << std::endl;
std::cerr << Comp2->GetNthTransform(i)->GetParameters() << std::endl;
std::cerr << "The input composite transforms are not equal! The transform parameters are different!"
<< std::endl;
return EXIT_FAILURE;
}
}
else
{
// compare two displacement field transforms by considering a tolerance
const typename DisplacementFieldTransformType::ConstPointer DispTrans1 =
dynamic_cast<DisplacementFieldTransformType *>(Comp1->GetNthTransform(i).GetPointer());
const typename DisplacementFieldTransformType::ConstPointer DispTrans2 =
dynamic_cast<DisplacementFieldTransformType *>(Comp2->GetNthTransform(i).GetPointer());
const typename DisplacementFieldType::ConstPointer DispField1 = DispTrans1->GetDisplacementField();
const typename DisplacementFieldType::ConstPointer DispField2 = DispTrans2->GetDisplacementField();
using DispIteratorType = itk::ImageRegionConstIteratorWithIndex<DisplacementFieldType>;
DispIteratorType dit1(DispField1, DispField1->GetLargestPossibleRegion());
DispIteratorType dit2(DispField2, DispField2->GetLargestPossibleRegion());
dit1.GoToBegin();
dit2.GoToBegin();
while (!dit1.IsAtEnd() && !dit2.IsAtEnd())
{
typename DisplacementFieldType::PixelType v1 = dit1.Get();
typename DisplacementFieldType::PixelType v2 = dit2.Get();
for (unsigned int index = 0; index < VImageDimension; ++index)
{
if (!itk::Math::FloatAlmostEqual(v1[index], v2[index], 4, 20)) // Compares two float numbers.
{
std::cerr << v1[index] << " != " << v2[index] << std::endl;
std::cerr << "The input composite transforms are not equal! The diffeomorphic transform parameters "
"are different!"
<< std::endl;
return EXIT_FAILURE;
}
}
++dit1;
++dit2;
}
}
}
else
{
std::cerr << "The input composite transforms are not equal! They contain different types of transform!"
<< std::endl;
return EXIT_FAILURE;
}
}
}
else
{
std::cerr << "The input composite transforms are not equal! They do not have the same number of transforms!"
<< std::endl;
return EXIT_FAILURE;
}
}
else
{
std::cout << "The input transforms are not composite transforms." << std::endl;
const std::string DisplacementFieldTransformID("DisplacementFieldTransform");
if (firstTransform->GetNameOfClass() == DisplacementFieldTransformID &&
secondTransform->GetNameOfClass() == DisplacementFieldTransformID)
{
std::cout << "The input transforms are displacement field transform type." << std::endl;
// compare two displacement field transforms by considering a tolerance
const typename DisplacementFieldTransformType::ConstPointer DispTrans1 =
dynamic_cast<DisplacementFieldTransformType *>(firstTransform.GetPointer());
const typename DisplacementFieldTransformType::ConstPointer DispTrans2 =
dynamic_cast<DisplacementFieldTransformType *>(secondTransform.GetPointer());
const typename DisplacementFieldType::ConstPointer DispField1 = DispTrans1->GetDisplacementField();
const typename DisplacementFieldType::ConstPointer DispField2 = DispTrans2->GetDisplacementField();
using DispIteratorType = itk::ImageRegionConstIteratorWithIndex<DisplacementFieldType>;
DispIteratorType dit1(DispField1, DispField1->GetLargestPossibleRegion());
DispIteratorType dit2(DispField2, DispField2->GetLargestPossibleRegion());
dit1.GoToBegin();
dit2.GoToBegin();
while (!dit1.IsAtEnd() && !dit2.IsAtEnd())
{
typename DisplacementFieldType::PixelType v1 = dit1.Get();
typename DisplacementFieldType::PixelType v2 = dit2.Get();
for (unsigned int index = 0; index < VImageDimension; ++index)
{
if (!itk::Math::FloatAlmostEqual(v1[index], v2[index], 4, 20)) // Compares two float numbers.
{
std::cerr << v1[index] << " != " << v2[index] << std::endl;
std::cerr << "The input displacement field transforms are not equal! The diffeomorphic transform "
"parameters are different!"
<< std::endl;
return EXIT_FAILURE;
}
}
++dit1;
++dit2;
}
}
else
{
std::cout << "The input transforms are neither composite transform nor displacement field transform."
<< std::endl;
std::cout << "First Transform Type: " << firstTransform->GetNameOfClass() << std::endl;
std::cout << "Second Transform Type: " << secondTransform->GetNameOfClass() << std::endl;
if (firstTransform->GetFixedParameters() != secondTransform->GetFixedParameters() ||
firstTransform->GetParameters() != secondTransform->GetParameters())
{
std::cerr << "The input transforms are not equal! The transform parameters are different!" << std::endl;
return EXIT_FAILURE;
}
}
}
std::cout << "Two input transforms are the same!" << std::endl;
return EXIT_SUCCESS;
}
int
compareTwoTransforms(std::vector<std::string> args, std::ostream * /* out_stream = nullptr */)
{
// the arguments coming in as 'args' is a replacement for the standard (argc,argv) format
// Just notice that the argv[i] equals to args[i-1]
// and the argc equals:
int argc = args.size() + 1;
if (argc != 3)
{
std::cerr << "Usage: compareTwoTransforms\n"
<< "<First Transform> , <Second Transform>" << std::endl;
return EXIT_FAILURE;
}
{
itk::Transform<double, 2, 2>::Pointer firstTransform = itk::ants::ReadTransform<double, 2>(args[0]);
itk::Transform<double, 2, 2>::Pointer secondTransform = itk::ants::ReadTransform<double, 2>(args[1]);
if (firstTransform.IsNotNull() && secondTransform.IsNotNull())
{
using BSplineTransformType = itk::BSplineTransform<double, 2, 2>;
BSplineTransformType::Pointer bsplineInput1 = dynamic_cast<BSplineTransformType *>(firstTransform.GetPointer());
BSplineTransformType::Pointer bsplineInput2 = dynamic_cast<BSplineTransformType *>(secondTransform.GetPointer());
if (bsplineInput1.IsNull() && bsplineInput2.IsNull())
{
return compareTransforms<2>(firstTransform, secondTransform);
}
else
{
std::cerr << "BSpline transform type is not supported." << std::endl;
return EXIT_FAILURE;
}
}
}
{
itk::Transform<double, 3, 3>::Pointer firstTransform = itk::ants::ReadTransform<double, 3>(args[0]);
itk::Transform<double, 3, 3>::Pointer secondTransform = itk::ants::ReadTransform<double, 3>(args[1]);
if (firstTransform.IsNotNull() && secondTransform.IsNotNull())
{
using BSplineTransformType = itk::BSplineTransform<double, 3, 3>;
BSplineTransformType::Pointer bsplineInput1 = dynamic_cast<BSplineTransformType *>(firstTransform.GetPointer());
BSplineTransformType::Pointer bsplineInput2 = dynamic_cast<BSplineTransformType *>(secondTransform.GetPointer());
if (bsplineInput1.IsNull() && bsplineInput2.IsNull())
{
return compareTransforms<3>(firstTransform, secondTransform);
}
else
{
std::cerr << "BSpline transform type is not supported." << std::endl;
return EXIT_FAILURE;
}
}
}
std::cerr << "Can't read input transforms" << std::endl;
return EXIT_FAILURE;
}
} // namespace ants
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