Widget for displaying image histograms based on the vtkQtChart framework. More...

#include <QmitkVtkHistogramWidget.h>

Collaboration diagram for QmitkVtkHistogramWidget:

Public Types
enum	{ HISTOGRAM_MODE_DIRECT = 0, HISTOGRAM_MODE_ENTIREIMAGE, HISTOGRAM_MODE_MASKEDIMAGE, HISTOGRAM_MODE_IMAGEREGION, HISTOGRAM_MODE_PLANARFIGUREREGION }
typedef mitk::Image::HistogramType	HistogramType
typedef mitk::Image::HistogramType::ConstIterator	HistogramConstIteratorType
typedef itk::ImageRegion< 3 >	RegionType
Public Member Functions
	QmitkVtkHistogramWidget (QWidget *)
virtual	~QmitkVtkHistogramWidget ()
void	SetHistogram (const HistogramType *histogram)
	Set histogram to be displayed directly.
void	SetImage (const mitk::Image *image)
	Set image from which to calculate the histogram.
void	SetImageMask (const mitk::Image *imageMask)
	Set binary image mask determining the voxels to include in histogram calculation.
void	SetImageRegion (const RegionType imageRegion)
	Set 3D image region for which to calculate the histogram.
void	SetPlanarFigure (const mitk::PlanarFigure *planarFigure)
	Set planar figure describing the region for which to calculate the histogram.
void	SetHistogramMode (unsigned int histogramMode)
	Set/Get operation mode for Histogram.
unsigned int	GetHistogramMode ()
	Set/Get operation mode for Histogram.
void	SetHistogramModeToDirectHistogram ()
	Set/Get operation mode for Histogram.
void	SetHistogramModeToEntireImage ()
	Set/Get operation mode for Histogram.
void	SetHistogramModeToMaskedImage ()
	Set/Get operation mode for Histogram.
void	SetHistogramModeToImageRegion ()
	Set/Get operation mode for Histogram.
void	SetHistogramModeToPlanarFigureRegion ()
	Set/Get operation mode for Histogram.
void	UpdateItemModelFromHistogram ()
void	ClearItemModel ()
	Clear the histogram (nothing is displayed).
Protected Member Functions
void	ComputeHistogram ()
Protected Attributes
vtkQtChartWidget *	m_ChartWidget
vtkQtBarChart *	m_BarChart
QStandardItemModel *	m_ItemModel
mitk::Image::ConstPointer	m_Image
mitk::Image::ConstPointer	m_ImageMask
RegionType	m_ImageRegion
mitk::PlanarFigure::ConstPointer	m_PlanarFigure
unsigned int	m_HistogramMode
HistogramType::ConstPointer	m_Histogram
HistogramType::ConstPointer	m_DerivedHistogram

Detailed Description

Widget for displaying image histograms based on the vtkQtChart framework.

Definition at line 44 of file QmitkVtkHistogramWidget.h.

Member Typedef Documentation

typedef mitk::Image::HistogramType::ConstIterator QmitkVtkHistogramWidget::HistogramConstIteratorType

Definition at line 53 of file QmitkVtkHistogramWidget.h.

typedef mitk::Image::HistogramType QmitkVtkHistogramWidget::HistogramType

Definition at line 52 of file QmitkVtkHistogramWidget.h.

typedef itk::ImageRegion< 3 > QmitkVtkHistogramWidget::RegionType

Definition at line 55 of file QmitkVtkHistogramWidget.h.

Member Enumeration Documentation

anonymous enum

Enumerator:

HISTOGRAM_MODE_DIRECT
HISTOGRAM_MODE_ENTIREIMAGE
HISTOGRAM_MODE_MASKEDIMAGE
HISTOGRAM_MODE_IMAGEREGION
HISTOGRAM_MODE_PLANARFIGUREREGION

Definition at line 57 of file QmitkVtkHistogramWidget.h.

  {
    HISTOGRAM_MODE_DIRECT = 0,
    HISTOGRAM_MODE_ENTIREIMAGE,
    HISTOGRAM_MODE_MASKEDIMAGE,
    HISTOGRAM_MODE_IMAGEREGION,
    HISTOGRAM_MODE_PLANARFIGUREREGION
  };

Constructor & Destructor Documentation

QmitkVtkHistogramWidget::QmitkVtkHistogramWidget ( QWidget * )

Definition at line 43 of file QmitkVtkHistogramWidget.cpp.

References vtkQtChartMouseSelection::addHandler(), vtkQtChartAxis::Bottom, vtkQtChartInteractorSetup::createDefault(), vtkQtChartAxisLayer::getAxis(), vtkQtChartArea::getAxisLayer(), vtkQtChartArea::getAxisLayerIndex(), vtkQtChartWidget::getChartArea(), vtkQtChartAxis::getOptions(), vtkQtChartArea::insertLayer(), vtkQtChartAxis::Left, m_BarChart, m_ChartWidget, m_ItemModel, vtkQtChartAxisOptions::setGridVisible(), vtkQtChartSeriesSelectionHandler::setLayer(), vtkQtChartSeriesSelectionHandler::setModeNames(), vtkQtChartSeriesSelectionHandler::setMousePressModifiers(), vtkQtChartAxisOptions::setNotation(), vtkQtChartAxisOptions::setPrecision(), vtkQtChartMouseSelection::setSelectionMode(), and vtkQtChartAxisOptions::Standard.

: m_HistogramMode( HISTOGRAM_MODE_ENTIREIMAGE )
{
  //QGroupBox *hgroupbox = new QGroupBox( "", this );
  //hgroupbox->setMinimumSize( 150, 150 );

  m_ChartWidget = new vtkQtChartWidget( this );

  QBoxLayout *layout = new QVBoxLayout( this );
  layout->addWidget( m_ChartWidget );
  layout->setSpacing( 10 );

  vtkQtChartArea *area = m_ChartWidget->getChartArea();

  // Set up the bar chart.
  m_BarChart = new vtkQtBarChart();
  area->insertLayer( area->getAxisLayerIndex(), m_BarChart );

  // Set up the default interactor.
  vtkQtChartMouseSelection *selector =
    vtkQtChartInteractorSetup::createDefault( area );
  vtkQtChartSeriesSelectionHandler *handler =
    new vtkQtChartSeriesSelectionHandler( selector );
  handler->setModeNames( "Bar Chart - Series", "Bar Chart - Bars" );
  handler->setMousePressModifiers( Qt::ControlModifier, Qt::ControlModifier );
  handler->setLayer( m_BarChart );
  selector->addHandler( handler );
  selector->setSelectionMode("Bar Chart - Bars");

  // Hide the x-axis grid.
  vtkQtChartAxisLayer *axisLayer = area->getAxisLayer();
  vtkQtChartAxis *xAxis = axisLayer->getAxis(vtkQtChartAxis::Bottom);
  xAxis->getOptions()->setGridVisible(false);
  xAxis->getOptions()->setPrecision( 0 );
  xAxis->getOptions()->setNotation( vtkQtChartAxisOptions::Standard );
  
  vtkQtChartAxis *yAxis = axisLayer->getAxis(vtkQtChartAxis::Left);
  yAxis->getOptions()->setPrecision( 0 );
  yAxis->getOptions()->setNotation( vtkQtChartAxisOptions::Standard );

  // Set up the model for the bar chart.
  m_ItemModel = new QStandardItemModel( m_BarChart );
  m_ItemModel->setItemPrototype( new QStandardItem() );
}

QmitkVtkHistogramWidget::~QmitkVtkHistogramWidget ( ) [virtual]

Definition at line 90 of file QmitkVtkHistogramWidget.cpp.

{
}

Member Function Documentation

void QmitkVtkHistogramWidget::ClearItemModel ( )

Clear the histogram (nothing is displayed).

Definition at line 203 of file QmitkVtkHistogramWidget.cpp.

References m_ItemModel.

Referenced by QmitkImageStatistics::OnSelectionChanged(), UpdateItemModelFromHistogram(), and QmitkImageStatistics::UpdateStatistics().

{
  m_ItemModel->clear();
}

void QmitkVtkHistogramWidget::ComputeHistogram ( ) [protected]

Definition at line 209 of file QmitkVtkHistogramWidget.cpp.

References HISTOGRAM_MODE_DIRECT, HISTOGRAM_MODE_ENTIREIMAGE, HISTOGRAM_MODE_IMAGEREGION, HISTOGRAM_MODE_MASKEDIMAGE, HISTOGRAM_MODE_PLANARFIGUREREGION, m_DerivedHistogram, m_Histogram, m_HistogramMode, m_Image, and mitk::HistogramGenerator::New().

Referenced by UpdateItemModelFromHistogram().

{
  switch ( m_HistogramMode )
  {
  case HISTOGRAM_MODE_DIRECT:
    {
      m_DerivedHistogram = m_Histogram;
      break;
    }

  case HISTOGRAM_MODE_ENTIREIMAGE:
    {
      mitk::HistogramGenerator::Pointer histogramGenerator = mitk::HistogramGenerator::New();
      histogramGenerator->SetImage( m_Image );
      histogramGenerator->ComputeHistogram();
      m_DerivedHistogram = histogramGenerator->GetHistogram();
      break;
    }

  case HISTOGRAM_MODE_MASKEDIMAGE:
    {
      break;
    }

  case HISTOGRAM_MODE_IMAGEREGION:
    {
      break;
    }

  case HISTOGRAM_MODE_PLANARFIGUREREGION:
    {
      break;
    }
  }
}

unsigned int QmitkVtkHistogramWidget::GetHistogramMode ( )

Set/Get operation mode for Histogram.

Definition at line 275 of file QmitkVtkHistogramWidget.cpp.

References m_HistogramMode.

{
  return m_HistogramMode;
}

void QmitkVtkHistogramWidget::SetHistogram ( const HistogramType * histogram )

Set histogram to be displayed directly.

Definition at line 245 of file QmitkVtkHistogramWidget.cpp.

References m_Histogram.

Referenced by QmitkImageStatistics::ComputeIntensityProfile(), and QmitkImageStatistics::UpdateStatistics().

{
  m_Histogram = histogram;
}

void QmitkVtkHistogramWidget::SetHistogramMode ( unsigned int histogramMode )

Set/Get operation mode for Histogram.

Definition at line 270 of file QmitkVtkHistogramWidget.cpp.

References m_HistogramMode.

{
  m_HistogramMode = histogramMode;
}

void QmitkVtkHistogramWidget::SetHistogramModeToDirectHistogram ( )

Set/Get operation mode for Histogram.

Definition at line 95 of file QmitkVtkHistogramWidget.cpp.

References HISTOGRAM_MODE_DIRECT, and m_HistogramMode.

Referenced by QmitkImageStatistics::ComputeIntensityProfile(), and QmitkImageStatistics::UpdateStatistics().

{
  if ( m_HistogramMode != HISTOGRAM_MODE_DIRECT )
  {
    m_HistogramMode = HISTOGRAM_MODE_DIRECT;
  }
}

void QmitkVtkHistogramWidget::SetHistogramModeToEntireImage ( )

Set/Get operation mode for Histogram.

Definition at line 104 of file QmitkVtkHistogramWidget.cpp.

References HISTOGRAM_MODE_ENTIREIMAGE, and m_HistogramMode.

{
  if ( m_HistogramMode != HISTOGRAM_MODE_ENTIREIMAGE )
  {
    m_HistogramMode = HISTOGRAM_MODE_ENTIREIMAGE;
  }
}

void QmitkVtkHistogramWidget::SetHistogramModeToImageRegion ( )

Set/Get operation mode for Histogram.

Definition at line 122 of file QmitkVtkHistogramWidget.cpp.

References HISTOGRAM_MODE_IMAGEREGION, and m_HistogramMode.

{
  if ( m_HistogramMode != HISTOGRAM_MODE_IMAGEREGION )
  {
    m_HistogramMode = HISTOGRAM_MODE_IMAGEREGION;
  }
}

void QmitkVtkHistogramWidget::SetHistogramModeToMaskedImage ( )

Set/Get operation mode for Histogram.

Definition at line 113 of file QmitkVtkHistogramWidget.cpp.

References HISTOGRAM_MODE_MASKEDIMAGE, and m_HistogramMode.

{
  if ( m_HistogramMode != HISTOGRAM_MODE_MASKEDIMAGE )
  {
    m_HistogramMode = HISTOGRAM_MODE_MASKEDIMAGE;
  }
}

void QmitkVtkHistogramWidget::SetHistogramModeToPlanarFigureRegion ( )

Set/Get operation mode for Histogram.

Definition at line 130 of file QmitkVtkHistogramWidget.cpp.

References HISTOGRAM_MODE_PLANARFIGUREREGION, and m_HistogramMode.

{
  if ( m_HistogramMode != HISTOGRAM_MODE_PLANARFIGUREREGION )
  {
    m_HistogramMode = HISTOGRAM_MODE_PLANARFIGUREREGION;
  }
}

void QmitkVtkHistogramWidget::SetImage ( const mitk::Image * image )

Set image from which to calculate the histogram.

Definition at line 250 of file QmitkVtkHistogramWidget.cpp.

References m_Image.

{
  m_Image = image;
}

void QmitkVtkHistogramWidget::SetImageMask ( const mitk::Image * imageMask )

Set binary image mask determining the voxels to include in histogram calculation.

Definition at line 255 of file QmitkVtkHistogramWidget.cpp.

References m_ImageMask.

{
  m_ImageMask = imageMask;
}

void QmitkVtkHistogramWidget::SetImageRegion ( const RegionType imageRegion )

Set 3D image region for which to calculate the histogram.

Definition at line 260 of file QmitkVtkHistogramWidget.cpp.

References m_ImageRegion.

{
  m_ImageRegion = imageRegion;
}

void QmitkVtkHistogramWidget::SetPlanarFigure ( const mitk::PlanarFigure * planarFigure )

Set planar figure describing the region for which to calculate the histogram.

Definition at line 265 of file QmitkVtkHistogramWidget.cpp.

References m_PlanarFigure.

{
  m_PlanarFigure = planarFigure;
}

void QmitkVtkHistogramWidget::UpdateItemModelFromHistogram ( )

Fill the graphical widget with currently specified histogram.

Definition at line 139 of file QmitkVtkHistogramWidget.cpp.

References ClearItemModel(), ComputeHistogram(), m_BarChart, m_ChartWidget, m_DerivedHistogram, m_ItemModel, and vtkQtBarChart::setModel().

Referenced by QmitkImageStatistics::ComputeIntensityProfile(), and QmitkImageStatistics::UpdateStatistics().

{
  this->ComputeHistogram();

  if ( m_DerivedHistogram.IsNull() )
  {
    return;
  }

  // Determine non-zero range of histogram
  unsigned int startIndex = 0, endIndex = 0, i = 0;
  HistogramConstIteratorType startIt = m_DerivedHistogram->End();
  HistogramConstIteratorType endIt = m_DerivedHistogram->End();
  HistogramConstIteratorType it;
  bool firstNonEmptyBinFound = false;
  for ( it = m_DerivedHistogram->Begin(); it != m_DerivedHistogram->End(); ++it, ++i )
  {
    if ( it.GetFrequency() > 0.0 )
    {
      endIt = it;
      endIndex = i;
      if ( !firstNonEmptyBinFound )
      {
        firstNonEmptyBinFound = true;
        startIt = it;
        startIndex = i;
      }
    }
  }
  ++endIt;

  // For empty image / mask: clear histogram
  if ( startIt == m_DerivedHistogram->End() )
  {
    this->ClearItemModel();
    return;
  }

  // Allocate data in item model
  m_ItemModel->setRowCount( endIndex + 1 - startIndex );
  m_ItemModel->setColumnCount( 1 );

  // Fill item model with histogram data
  for ( it = startIt, i = 0; it != endIt; ++it, ++i )
  {
    const double &frequency = it.GetFrequency();
    const double &measurement = it.GetMeasurementVector()[0];
    
    m_ItemModel->setVerticalHeaderItem( i, new QStandardItem() );
    m_ItemModel->verticalHeaderItem( i )->setData(
      QVariant( measurement ), Qt::DisplayRole );

    m_ItemModel->setItem( i, 0, new QStandardItem() );
    m_ItemModel->item( i, 0 )->setData( QVariant( frequency ), Qt::DisplayRole );
  }

  vtkQtChartTableSeriesModel *table =
    new vtkQtChartTableSeriesModel( m_ItemModel, m_BarChart );
  m_BarChart->setModel( table );

  m_ChartWidget->show();
}