DilationGrayscale.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
//Binary Dilation
void MainWindow::OnShowDilationGrayscaleClicked()
{
    unsigned int radius=2;
    ui->radiusSlider->setMinimum(0);
    ui->radiusSlider->setMaximum(50);
    radius = ui->radiusSlider->value();
    typedef   unsigned char  InputPixelType;
    typedef   unsigned char  OutputPixelType;
    typedef itk::Image< InputPixelType,  2 >   InputImageType;
    typedef itk::Image< OutputPixelType, 2 >   OutputImageType;
      typedef itk::Image<unsigned char, 2>    ImageType;
      typedef itk::ImageFileReader<InputImageType> ReaderType;
      typedef itk::ImageToVTKImageFilter<OutputImageType>       ConnectorType;
      ReaderType::Pointer reader = ReaderType::New();
      reader->SetFileName((const char*)filename.toStdString().c_str());

      typedef itk::BinaryBallStructuringElement<
        ImageType::PixelType,2>                  StructuringElementType;
      StructuringElementType structuringElement;
      structuringElement.SetRadius(radius);
      structuringElement.CreateStructuringElement();

      typedef itk::GrayscaleDilateImageFilter <ImageType, ImageType, StructuringElementType>
              GrayscaleDilateImageFilterType;

      GrayscaleDilateImageFilterType::Pointer dilateFilter
              = GrayscaleDilateImageFilterType::New();
      dilateFilter->SetInput(reader->GetOutput());
      dilateFilter->SetKernel(structuringElement);

      ConnectorType::Pointer connector = ConnectorType::New();
      connector->SetInput(dilateFilter->GetOutput());
      vtkSmartPointer<vtkImageActor> actor =
        vtkSmartPointer<vtkImageActor>::New();
    #if VTK_MAJOR_VERSION <= 5
      actor->SetInput(connector->GetOutput());
    #else
      connector->Update();
      actor->GetMapper()->SetInputData(connector->GetOutput());
    #endif
      vtkSmartPointer<vtkRenderer> dilateErodeRenderer =
        vtkSmartPointer<vtkRenderer>::New();
      dilateErodeRenderer->AddActor(actor);
      dilateErodeRenderer->ResetCamera();


      ui->qvtkWidget_4->GetRenderWindow()->AddRenderer(dilateErodeRenderer);
      //ui->qvtkWidget_4->GetRenderWindow()->AddRenderer(originalRenderer);
      ui->qvtkWidget_4->GetRenderWindow()->Render();
}