mitk::LevelWindow::LevelWindow(mitk::ScalarType level, mitk::ScalarType window)
: m_LowerWindowBound( level - window / 2.0 ), m_UpperWindowBound( level + window / 2.0 ),
m_RangeMin( -2048.0 ), m_RangeMax( 4096.0 ),
m_DefaultLowerBound( -2048.0 ), m_DefaultUpperBound( 4096.0 ),
m_Fixed( false )
{
SetDefaultLevelWindow(level, window);
SetLevelWindow(level, window, true);
}
void mitk::LevelWindow::ResetDefaultLevelWindow()
{
SetLevelWindow(GetDefaultLevel(), GetDefaultWindow());
}
void QmitkExampleView::ProcessSelectedImage()
{
// Before we even think about processing something, we need to make sure
// that we have valid input. Don't be sloppy, this is a main reason
// for application crashes if neglected.
auto selectedDataNodes = this->GetDataManagerSelection();
if (selectedDataNodes.empty())
return;
auto firstSelectedDataNode = selectedDataNodes.front();
if (firstSelectedDataNode.IsNull())
{
QMessageBox::information(nullptr, "Example View", "Please load and select an image before starting image processing.");
return;
}
auto data = firstSelectedDataNode->GetData();
// Something is selected, but does it contain data?
if (data != nullptr)
{
// We don't use the auto keyword here, which would evaluate to a native
// image pointer. Instead, we want a smart pointer in order to ensure that
// the image isn't deleted somewhere else while we're using it.
mitk::Image::Pointer image = dynamic_cast<mitk::Image*>(data);
// Something is selected and it contains data, but is it an image?
if (image.IsNotNull())
{
auto imageName = firstSelectedDataNode->GetName();
auto offset = m_Controls.offsetSpinBox->value();
MITK_INFO << "Process image \"" << imageName << "\" ...";
// We're finally using the ExampleImageFilter from ExtExampleModule.
auto filter = ExampleImageFilter::New();
filter->SetInput(image);
filter->SetOffset(offset);
filter->Update();
mitk::Image::Pointer processedImage = filter->GetOutput();
if (processedImage.IsNull() || !processedImage->IsInitialized())
return;
MITK_INFO << " done";
// Stuff the resulting image into a data node, set some properties,
// and add it to the data storage, which will eventually display the
// image in the application.
auto processedImageDataNode = mitk::DataNode::New();
processedImageDataNode->SetData(processedImage);
QString name = QString("%1 (Offset: %2)").arg(imageName.c_str()).arg(offset);
processedImageDataNode->SetName(name.toStdString());
// We don't really need to copy the level window, but if we wouldn't
// do it, the new level window would be initialized to display the image
// with optimal contrast in order to capture the whole range of pixel
// values. This is also true for the input image as long as one didn't
// modify its level window manually. Thus, the images would appear
// identical unless you compare the level window widget for both images.
mitk::LevelWindow levelWindow;
if (firstSelectedDataNode->GetLevelWindow(levelWindow))
processedImageDataNode->SetLevelWindow(levelWindow);
// We also attach our ExampleImageInteractor, which allows us to paint
// on the resulting images by using the mouse as long as the CTRL key
// is pressed.
auto interactor = CreateExampleImageInteractor();
if (interactor.IsNotNull())
interactor->SetDataNode(processedImageDataNode);
this->GetDataStorage()->Add(processedImageDataNode);
}
}
// Now it's your turn. This class/method has lots of room for improvements,
// for example:
//
// - What happens when multiple items are selected but the first one isn't
// an image? - There isn't any feedback for the user at all.
// - What's the front item of a selection? Does it depend on the order
// of selection or the position in the Data Manager? - Isn't it
// better to process all selected images? Don't forget to adjust the
// titles of the UI widgets.
// - In addition to the the displayed label, it's probably a good idea to
// enable or disable the button depending on the selection.
}
void mitk::LevelWindowProperty::SetValue(const ValueType& levWin)
{
SetLevelWindow(levWin);
}
mitk::LevelWindowProperty::LevelWindowProperty(const mitk::LevelWindow &levWin)
{
SetLevelWindow(levWin);
}
