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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkImageRegistrationMethodImageSource.h,v $
Language: C++
Date: $Date: 2003-09-10 14:30:03 $
Version: $Revision: 1.7 $
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.
=========================================================================*/
#include "itkImage.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkCommandIterationUpdate.h"
/**
* This class generates two 2D-Gaussians (standard deviation RegionSize/2)
* One is shifted by 7,3 pixels from the other.
*
* These two images are provided to the registration methods in this
* directory in order to obtain a uniform test input data.
*
* Therefore the solution of the registration is |-7 -3|
*/
namespace itk
{
namespace testhelper
{
template< typename TFixedPixelType,
typename TMovingPixelType,
unsigned int NDimension >
class ImageRegistrationMethodImageSource : public itk::Object
{
public:
typedef ImageRegistrationMethodImageSource Self;
typedef Object Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
typedef Array<double> ParametersType;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(Image, Object);
typedef itk::Image<TMovingPixelType,NDimension> MovingImageType;
typedef itk::Image<TFixedPixelType,NDimension > FixedImageType;
const MovingImageType * GetMovingImage(void) const
{
return m_MovingImage.GetPointer();
}
const FixedImageType * GetFixedImage(void) const
{
return m_FixedImage.GetPointer();
}
const ParametersType & GetActualParameters(void) const
{
return m_Parameters;
}
void GenerateImages( const typename MovingImageType::SizeType & size )
{
typename MovingImageType::IndexType index;
index.Fill(0);
typename MovingImageType::RegionType region;
region.SetSize( size );
region.SetIndex( index );
m_MovingImage->SetLargestPossibleRegion( region );
m_MovingImage->SetBufferedRegion( region );
m_MovingImage->SetRequestedRegion( region );
m_MovingImage->Allocate();
m_FixedImage->SetLargestPossibleRegion( region );
m_FixedImage->SetBufferedRegion( region );
m_FixedImage->SetRequestedRegion( region );
m_FixedImage->Allocate();
/* Fill images with a 2D gaussian*/
typedef itk::ImageRegionIteratorWithIndex<MovingImageType> MovingImageIteratorType;
typedef itk::ImageRegionIteratorWithIndex<FixedImageType> FixedImageIteratorType;
itk::Point<double,2> center;
center[0] = (double)region.GetSize()[0]/2.0;
center[1] = (double)region.GetSize()[1]/2.0;
const double s = (double)region.GetSize()[0]/2.0;
itk::Point<double,2> p;
itk::Vector<double,2> d;
/* Set the displacement */
itk::Vector<double,2> displacement;
displacement[0] = m_Parameters[0];
displacement[1] = m_Parameters[1];
MovingImageIteratorType ri(m_MovingImage,region);
FixedImageIteratorType ti(m_FixedImage,region);
while(!ri.IsAtEnd())
{
p[0] = ri.GetIndex()[0];
p[1] = ri.GetIndex()[1];
d = p-center;
d += displacement;
const double x = d[0];
const double y = d[1];
const double value = 200.0 * exp( - ( x*x + y*y )/(s*s) );
ri.Set( static_cast<typename MovingImageType::PixelType>(value) );
++ri;
}
while(!ti.IsAtEnd())
{
p[0] = ti.GetIndex()[0];
p[1] = ti.GetIndex()[1];
d = p-center;
const double x = d[0];
const double y = d[1];
const double value = 200.0 * exp( - ( x*x + y*y )/(s*s) );
ti.Set( static_cast<typename FixedImageType::PixelType>(value) );
++ti;
}
}
protected:
ImageRegistrationMethodImageSource()
{
m_MovingImage = MovingImageType::New();
m_FixedImage = FixedImageType::New();
m_Parameters = ParametersType(2);
m_Parameters[0] = 7.0;
m_Parameters[1] = 3.0;
}
private:
typename FixedImageType::Pointer m_FixedImage;
typename MovingImageType::Pointer m_MovingImage;
ParametersType m_Parameters;
};
} // end namespace testhelper
} // end namespace itk
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