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#ifndef ITKDEFORMATIONFIELDFROMMULTITRANSFORMFILTER_H_
#define ITKDEFORMATIONFIELDFROMMULTITRANSFORMFILTER_H_
#include "itkWarpImageMultiTransformFilter.h"
namespace itk
{
template <
class TOutputImage,
class TDisplacementField,
class TTransform
>
class DisplacementFieldFromMultiTransformFilter :
public WarpImageMultiTransformFilter<TOutputImage, TOutputImage, TDisplacementField, TTransform>
{
public:
/** Standard class typedefs. */
typedef TOutputImage TInputImage;
typedef DisplacementFieldFromMultiTransformFilter Self;
typedef WarpImageMultiTransformFilter<TInputImage, TOutputImage, TDisplacementField, TTransform> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods) */
itkTypeMacro( DisplacementFieldFromMultiTransformFilter, WarpImageMultiTransformFilter );
/** Typedef to describe the output image region type. */
typedef typename TOutputImage::RegionType OutputImageRegionType;
/** Inherit some types from the superclass. */
typedef typename Superclass::InputImageType InputImageType;
typedef typename Superclass::InputImagePointer InputImagePointer;
typedef typename Superclass::OutputImageType OutputImageType;
typedef typename Superclass::OutputImagePointer OutputImagePointer;
typedef typename Superclass::InputImageConstPointer InputImageConstPointer;
typedef typename OutputImageType::IndexType IndexType;
typedef typename OutputImageType::SizeType SizeType;
typedef typename OutputImageType::PixelType PixelType;
typedef typename OutputImageType::SpacingType SpacingType;
/** Determine the image dimension. */
itkStaticConstMacro(ImageDimension, unsigned int,
TOutputImage::ImageDimension );
itkStaticConstMacro(InputImageDimension, unsigned int,
TInputImage::ImageDimension );
itkStaticConstMacro(DisplacementFieldDimension, unsigned int,
TDisplacementField::ImageDimension );
/** Displacement field typedef support. */
typedef TDisplacementField DisplacementFieldType;
typedef typename DisplacementFieldType::Pointer DisplacementFieldPointer;
typedef typename DisplacementFieldType::PixelType DisplacementType;
typedef typename DisplacementType::ValueType DisplacementScalarValueType;
typedef typename Superclass::PointType PointType;
virtual void GenerateInputRequestedRegion() ITK_OVERRIDE
{
Superclass::GenerateInputRequestedRegion();
}
virtual void BeforeThreadedGenerateData() ITK_OVERRIDE
{
};
virtual void AfterThreadedGenerateData() ITK_OVERRIDE
{
};
virtual void GenerateOutputInformation() ITK_OVERRIDE
{
// call the superclass's implementation
Superclass::GenerateOutputInformation();
};
protected:
DisplacementFieldFromMultiTransformFilter() : Superclass()
{
this->SetNumberOfRequiredInputs( 0 );
const DisplacementScalarValueType kMaxDisp = itk::NumericTraits<DisplacementScalarValueType>::max();
Superclass::m_EdgePaddingValue.Fill(kMaxDisp);
}
~DisplacementFieldFromMultiTransformFilter()
{
};
void PrintSelf(std::ostream& os, Indent indent) const ITK_OVERRIDE
{
Superclass::PrintSelf(os, indent);
};
/** WarpImageMultiTransformFilter is implemented as a multi-threaded filter.
* As such, it needs to provide and implementation for
* ThreadedGenerateData(). */
void ThreadedGenerateData(const OutputImageRegionType& outputRegionForThread,
ThreadIdType threadId ) ITK_OVERRIDE
{
OutputImagePointer outputPtr = this->GetOutput();
// support progress methods/callbacks
ProgressReporter progress(this, threadId, outputRegionForThread.GetNumberOfPixels() );
// iterator for the output image
ImageRegionIteratorWithIndex<OutputImageType> outputIt(outputPtr, outputRegionForThread);
// int cnt = 0;
while( !outputIt.IsAtEnd() )
{
PointType point1, point2;
// get the output image index
IndexType index = outputIt.GetIndex();
outputPtr->TransformIndexToPhysicalPoint( index, point1 );
const bool isinside = this->MultiTransformPoint(point1, point2, Superclass::m_bFirstDeformNoInterp, index);
if( isinside )
{
PixelType value;
for( int ii = 0; ii < OutputImageType::ImageDimension; ii++ )
{
value[ii] = point2[ii] - point1[ii];
}
outputIt.Set( value );
}
else
{
PixelType value;
const DisplacementScalarValueType kMaxDisp = itk::NumericTraits<DisplacementScalarValueType>::max();
for( int ii = 0; ii < OutputImageType::ImageDimension; ii++ )
{
value[ii] = kMaxDisp;
}
outputIt.Set( value );
}
++outputIt;
}
progress.CompletedPixel();
};
};
} // end namespace itk
#endif /*ITKDEFORMATIONFIELDFROMMULTITRANSFORMFILTER_H_*/
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