void MrtrixPeakImageConverter< PixelType >
::GenerateData()
{
// output vector field
vtkSmartPointer<vtkCellArray> m_VtkCellArray = vtkSmartPointer<vtkCellArray>::New();
vtkSmartPointer<vtkPoints> m_VtkPoints = vtkSmartPointer<vtkPoints>::New();
Vector<float, 4> spacing4 = m_InputImage->GetSpacing();
Point<float, 4> origin4 = m_InputImage->GetOrigin();
Matrix<double, 4, 4> direction4 = m_InputImage->GetDirection();
ImageRegion<4> imageRegion4 = m_InputImage->GetLargestPossibleRegion();
Vector<float, 3> spacing3;
Point<float, 3> origin3;
Matrix<double, 3, 3> direction3;
ImageRegion<3> imageRegion3;
spacing3[0] = spacing4[0]; spacing3[1] = spacing4[1]; spacing3[2] = spacing4[2];
origin3[0] = origin4[0]; origin3[1] = origin4[1]; origin3[2] = origin4[2];
for (int r=0; r<3; r++)
for (int c=0; c<3; c++)
direction3[r][c] = direction4[r][c];
imageRegion3.SetSize(0, imageRegion4.GetSize()[0]);
imageRegion3.SetSize(1, imageRegion4.GetSize()[1]);
imageRegion3.SetSize(2, imageRegion4.GetSize()[2]);
double minSpacing = spacing3[0];
if (spacing3[1]<minSpacing)
minSpacing = spacing3[1];
if (spacing3[2]<minSpacing)
minSpacing = spacing3[2];
m_DirectionImageContainer = DirectionImageContainerType::New();
typedef ImageRegionConstIterator< InputImageType > InputIteratorType;
int x = m_InputImage->GetLargestPossibleRegion().GetSize(0);
int y = m_InputImage->GetLargestPossibleRegion().GetSize(1);
int z = m_InputImage->GetLargestPossibleRegion().GetSize(2);
int numDirs = m_InputImage->GetLargestPossibleRegion().GetSize(3)/3;
m_NumDirectionsImage = ItkUcharImgType::New();
m_NumDirectionsImage->SetSpacing( spacing3 );
m_NumDirectionsImage->SetOrigin( origin3 );
m_NumDirectionsImage->SetDirection( direction3 );
m_NumDirectionsImage->SetRegions( imageRegion3 );
m_NumDirectionsImage->Allocate();
m_NumDirectionsImage->FillBuffer(0);
for (int i=0; i<numDirs; i++)
{
ItkDirectionImageType::Pointer directionImage = ItkDirectionImageType::New();
directionImage->SetSpacing( spacing3 );
directionImage->SetOrigin( origin3 );
directionImage->SetDirection( direction3 );
directionImage->SetRegions( imageRegion3 );
directionImage->Allocate();
Vector< PixelType, 3 > nullVec; nullVec.Fill(0.0);
directionImage->FillBuffer(nullVec);
for (int a=0; a<x; a++)
for (int b=0; b<y; b++)
for (int c=0; c<z; c++)
{
// generate vector field
typename InputImageType::IndexType index;
index.SetElement(0,a);
index.SetElement(1,b);
index.SetElement(2,c);
vnl_vector<double> dirVec; dirVec.set_size(4);
for (int k=0; k<3; k++)
{
index.SetElement(3,k+i*3);
dirVec[k] = m_InputImage->GetPixel(index);
}
dirVec[3] = 0;
vtkSmartPointer<vtkPolyLine> container = vtkSmartPointer<vtkPolyLine>::New();
itk::ContinuousIndex<double, 4> center;
center[0] = index[0];
center[1] = index[1];
center[2] = index[2];
center[3] = 0;
itk::Point<double, 4> worldCenter;
m_InputImage->TransformContinuousIndexToPhysicalPoint( center, worldCenter );
switch (m_NormalizationMethod)
{
case NO_NORM:
break;
case SINGLE_VEC_NORM:
dirVec.normalize();
break;
}
dirVec.normalize();
dirVec = m_InputImage->GetDirection()*dirVec;
itk::Point<double> worldStart;
worldStart[0] = worldCenter[0]-dirVec[0]/2 * minSpacing;
worldStart[1] = worldCenter[1]-dirVec[1]/2 * minSpacing;
worldStart[2] = worldCenter[2]-dirVec[2]/2 * minSpacing;
vtkIdType id = m_VtkPoints->InsertNextPoint(worldStart.GetDataPointer());
container->GetPointIds()->InsertNextId(id);
itk::Point<double> worldEnd;
worldEnd[0] = worldCenter[0]+dirVec[0]/2 * minSpacing;
worldEnd[1] = worldCenter[1]+dirVec[1]/2 * minSpacing;
worldEnd[2] = worldCenter[2]+dirVec[2]/2 * minSpacing;
id = m_VtkPoints->InsertNextPoint(worldEnd.GetDataPointer());
container->GetPointIds()->InsertNextId(id);
m_VtkCellArray->InsertNextCell(container);
// generate direction image
typename ItkDirectionImageType::IndexType index2;
index2[0] = a; index2[1] = b; index2[2] = c;
Vector< PixelType, 3 > pixel;
pixel.SetElement(0, dirVec[0]);
pixel.SetElement(1, dirVec[1]);
pixel.SetElement(2, dirVec[2]);
directionImage->SetPixel(index2, pixel);
if (dirVec.magnitude()>0.0001)
m_NumDirectionsImage->SetPixel(index2, m_NumDirectionsImage->GetPixel(index2)+1);
}
m_DirectionImageContainer->InsertElement(m_DirectionImageContainer->Size(), directionImage);
}
vtkSmartPointer<vtkPolyData> directionsPolyData = vtkSmartPointer<vtkPolyData>::New();
directionsPolyData->SetPoints(m_VtkPoints);
directionsPolyData->SetLines(m_VtkCellArray);
m_OutputFiberBundle = mitk::FiberBundleX::New(directionsPolyData);
}
void ShCoefficientImageExporter< PixelType, ShOrder >
::GenerateData()
{
if (m_InputImage.IsNull())
return;
Vector<double, 4> spacing4;
Point<float, 4> origin4;
Matrix<double, 4, 4> direction4; direction4.SetIdentity();
ImageRegion<4> imageRegion4;
Vector<double, 3> spacing3 = m_InputImage->GetSpacing();
Point<float, 3> origin3 = m_InputImage->GetOrigin();
Matrix<double, 3, 3> direction3 = m_InputImage->GetDirection();
ImageRegion<3> imageRegion3 = m_InputImage->GetLargestPossibleRegion();
spacing4[0] = spacing3[0]; spacing4[1] = spacing3[1]; spacing4[2] = spacing3[2]; spacing4[3] = 1;
origin4[0] = origin3[0]; origin4[1] = origin3[1]; origin4[2] = origin3[2]; origin4[3] = 0;
for (int r=0; r<3; r++)
for (int c=0; c<3; c++)
direction4[r][c] = direction3[r][c];
imageRegion4.SetSize(0, imageRegion3.GetSize()[0]);
imageRegion4.SetSize(1, imageRegion3.GetSize()[1]);
imageRegion4.SetSize(2, imageRegion3.GetSize()[2]);
imageRegion4.SetSize(3, (ShOrder*ShOrder + ShOrder + 2)/2 + ShOrder );
m_OutputImage = CoefficientImageType::New();
m_OutputImage->SetSpacing( spacing4 );
m_OutputImage->SetOrigin( origin4 );
m_OutputImage->SetDirection( direction4 );
m_OutputImage->SetRegions( imageRegion4 );
m_OutputImage->Allocate();
m_OutputImage->FillBuffer(0.0);
typedef ImageRegionConstIterator< InputImageType > InputIteratorType;
InputIteratorType it(m_InputImage, m_InputImage->GetLargestPossibleRegion());
int numCoeffs = imageRegion4.GetSize(3);
int x = imageRegion3.GetSize(0);
int y = imageRegion3.GetSize(1);
int z = imageRegion3.GetSize(2);
#ifdef WIN32
#pragma omp parallel for
#else
#pragma omp parallel for collapse(3)
#endif
for (int a=0; a<x; a++)
for (int b=0; b<y; b++)
for (int c=0; c<z; c++)
{
typename InputImageType::IndexType index3;
index3.SetElement(0,a);
index3.SetElement(1,b);
index3.SetElement(2,c);
CoefficientImageType::IndexType index4;
index4[0] = index3[0];
index4[1] = index3[1];
index4[2] = index3[2];
typename InputImageType::PixelType pix = m_InputImage->GetPixel(index3);
for (int i=0; i<numCoeffs; i++)
{
index4[3] = i;
m_OutputImage->SetPixel(index4, pix[i]);
}
}
}