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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkCenteredAffineTransformTest.cxx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include <iostream>
#include "itkCenteredAffineTransform.h"
#include "itkImage.h"
#include "vnl/vnl_vector_fixed.h"
typedef itk::Matrix<double,2,2> MatrixType;
typedef itk::Vector<double,2> VectorType;
namespace
{
void PrintVector( const VectorType & v )
{
for( unsigned int i=0; i<VectorType::Dimension; i++)
{
std::cout << v[i] << ", ";
}
std::cout << std::endl;
}
}
int itkCenteredAffineTransformTest(int, char *[])
{
int any = 0; // Any errors detected in testing?
MatrixType matrix2;
MatrixType inverse2;
VectorType vector2;
int i, j;
/* FIXME: This code exercises most of the methods but doesn't
actually check that the results are correct. */
/* Create a 2D identity transformation and show its parameters */
typedef itk::Point<double,6> ParametersType;
typedef itk::Matrix<double,2,6> JacobianType;
typedef itk::CenteredAffineTransform<double,2> Affine2DType;
Affine2DType::Pointer id2 = Affine2DType::New();
matrix2 = id2->GetMatrix();
vector2 = id2->GetOffset();
std::cout << "Matrix from instantiating an identity transform:"
<< std::endl << matrix2;
std::cout << "Vector from instantiating an identity transform:"
<< std::endl;
PrintVector( vector2 );
/* Create and show a simple 2D transform from given parameters */
matrix2[0][0] = 1;
matrix2[0][1] = 2;
matrix2[1][0] = 3;
matrix2[1][1] = 4;
vector2[0] = 5;
vector2[1] = 6;
Affine2DType::Pointer aff2 = Affine2DType::New();
aff2->SetMatrix( matrix2 );
aff2->SetOffset( vector2 );
for (i = 0; i < 2; i++) {
for (j = 0; j < 2; j++)
matrix2[i][j] = 0.0;
vector2[i] = 0.0;
}
std::cout << "Instantiation of a given 2D transform:" << std::endl;
aff2->Print( std::cout );
inverse2 = aff2->GetInverseMatrix();
std::cout << "Inverse matrix for the given transform:"
<< std::endl << inverse2;
/* Set parameters of a 2D transform */
matrix2[0][0] = 6;
matrix2[0][1] = 5;
matrix2[1][0] = 4;
matrix2[1][1] = 3;
vector2[0] = 2;
vector2[1] = 1;
aff2->SetMatrix(matrix2);
aff2->SetOffset(vector2);
for (i = 0; i < 2; i++) {
for (j = 0; j < 2; j++)
matrix2[i][j] = 0.0;
vector2[i] = 0.0;
}
matrix2 = aff2->GetMatrix();
vector2 = aff2->GetOffset();
std::cout << "Setting the matrix in an existing transform:"
<< std::endl << matrix2;
std::cout << "Setting the offset in an existing transform:"
<< std::endl;
PrintVector( vector2 );
/* Try composition of two transformations */
aff2->Compose( aff2 );
std::cout << "Result of a composition:" << std::endl;
aff2->Print( std::cout );
/* Compose with a translation */
VectorType trans;
trans[0] = 1;
trans[1] = 2;
aff2->Translate(trans);
std::cout << "Result of a translation:" << std::endl;
aff2->Print( std::cout );
/* Compose with an isotropic scaling */
aff2->Scale(.3, 1);
std::cout << "Result of isotropic scaling:" << std::endl;
aff2->Print( std::cout );
/* Compose with an anisotropic scaling */
VectorType scale;
scale[0] = .3;
scale[1] = .2;
aff2->Scale(scale);
std::cout << "Result of anisotropic scaling:" << std::endl;
aff2->Print( std::cout );
/* Compose with a general N-D rotation */
aff2->Rotate(0, 1, 0.57, 1);
std::cout << "Result of general rotation:" << std::endl;
aff2->Print( std::cout );
/* Compose with a 2-D rotation */
aff2->Rotate(0, 1, -0.57, 1);
std::cout << "Result of 2-D rotation:" << std::endl;
aff2->Print( std::cout );
/* Compose with a shear */
aff2->Shear(1, 0, .2);
std::cout << "Result of shear:" << std::endl;
aff2->Print( std::cout );
/* Transform a point */
itk::Point<double, 2> u2, v2;
u2[0] = 3;
u2[1] = 5;
v2 = aff2->TransformPoint(u2);
std::cout << "Transform a point:" << std::endl
<< v2[0] << " , " << v2[1] << std::endl;
///* Back transform a point */
//v2 = aff2->BackTransform(u2);
//std::cout << "Back transform a point:" << std::endl
//<< v2[0] << " , " << v2[1] << std::endl;
/* Transform a vnl_vector */
vnl_vector_fixed<double, 2> x2, y2;
x2[0] = 1;
x2[1] = 2;
y2 = aff2->TransformVector(x2);
std::cout << "Transform a vnl_vector:" << std::endl
<< y2[0] << " , " << y2[1] << std::endl;
///* Back transform a vector */
//y2 = aff2->BackTransform(x2);
//std::cout << "Back transform a vnl_vector:" << std::endl
//<< y2[0] << " , " << y2[1] << std::endl;
/* Transform a vector */
itk::Vector<double, 2> u3, v3;
u3[0] = 3;
u3[1] = 5;
v3 = aff2->TransformVector(u3);
std::cout << "Transform a vector:" << std::endl
<< v3[0] << " , " << v3[1] << std::endl;
///* Back transform a vector */
//v3 = aff2->BackTransform(u3);
//std::cout << "Back transform a vector :" << std::endl
//<< v3[0] << " , " << v3[1] << std::endl;
/* Transform a Covariant vector */
itk::Vector<double, 2> u4, v4;
u4[0] = 3;
u4[1] = 5;
v4 = aff2->TransformVector(u4);
std::cout << "Transform a Covariant vector:" << std::endl
<< v4[0] << " , " << v4[1] << std::endl;
///* Back transform a vector */
//v4 = aff2->BackTransform(u4);
//std::cout << "Back transform a vector :" << std::endl
//<< v4[0] << " , " << v4[1] << std::endl;
/* Create a 3D transform and rotate in 3D */
typedef itk::CenteredAffineTransform<double,3> Affine3DType;
Affine3DType::Pointer aff3 = Affine3DType::New();
itk::Vector<double,3> axis;
axis[0] = .707;
axis[1] = .707;
axis[2] = .707;
aff3->Rotate3D(axis, 1.0, 1);
std::cout << "Create and rotate a 3D transform:" << std::endl;
aff3->Print( std::cout );
/* Generate inverse transform */
Affine3DType::Pointer inv3 = Affine3DType::New();
if(!aff3->GetInverse(inv3))
{
std::cout << "Cannot create inverse transformation" << std::endl;
}
std::cout << "Create an inverse transformation:" << std::endl;
inv3->Print( std::cout );
Affine3DType::Pointer inv4 =
dynamic_cast<Affine3DType*>(aff3->GetInverseTransform().GetPointer());
if(!inv4)
{
std::cout << "Cannot compute inverse transformation" << std::endl;
return EXIT_FAILURE;
}
std::cout << "Create an inverse transformation:" << std::endl;
inv4->Print( std::cout );
/* Create an image for testing index<->physical transforms */
std::cout << "Creating image for testing index<->physical transforms"
<< std::endl;
double spacing[3] = {1.0, 2.0, 3.0};
double origin [3] = {4.0, 5.0, 6.0};
itk::Image<unsigned char, 3>::Pointer
image =itk::Image<unsigned char, 3>::New();
image->SetOrigin (origin);
image->SetSpacing(spacing);
/* Test output of GetJacobian */
Affine3DType::Pointer jaff = Affine3DType::New();
Affine3DType::MatrixType jaffMatrix = jaff->GetMatrix();
Affine3DType::OffsetType jaffVector = jaff->GetOffset();
Affine3DType::InputPointType jpoint;
jpoint[0] = 5.0;
jpoint[1] = 10.0;
jpoint[2] = 15.0;
Affine3DType::JacobianType jaffJacobian = jaff->GetJacobian( jpoint );
std::cout << "GetJacobian: " << std::endl;
std::cout << jaffJacobian << std::endl;
/* Get the parameters */
Affine3DType::ParametersType parameters3D;
parameters3D = aff3->GetParameters();
std::cout << "Parameters 3D: " << parameters3D << std::endl;
/* Now set the parameters of another matrix */
jaff->SetParameters(parameters3D);
std::cout << "A transform after SetParameters:" << std::endl;
jaff->Print( std::cout );
return any;
}
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