MITK Tutorial - Step 1: Displaying an image

• Path to files used in this step:
  https://www.mitk.org/download/tutorial-data/Pic3D.nrrd

Open your IDE. All steps can be found among the listed projects. The first program shows how to display an image in a 2D view. The picture above is a screenshot of the program. The program has to be executed using the image file Pic3D.nrrd.

If you are using Visual Studio start MITK.sln in your bin\ subdirectory to start it with all required paths set. To set the image file path in Visual Studio, right click on "MitkStep1"-project and go to 'Properties -> Configuration Properties -> Debugging'. Now insert the image file path to Pic3D.nrrd in the "Command Arguments" text field. Then right click on the "MitkStep1"-project again and select "Set as StartUp Project". Start to run the code. Use this also in the following steps.

The code is divided into parts I through V. First of all a DataTree has to be created. Then data has to be read from a file which afterwards has to be put into the tree. Part IV creates a window and passes the tree to it. The last part deals with some Qt-specific initialization.

/*============================================================================
 
The Medical Imaging Interaction Toolkit (MITK)
 
Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.
 
Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.
 
============================================================================*/
 
#include "QmitkRegisterClasses.h"
#include "QmitkRenderWindow.h"
 
#include <mitkStandaloneDataStorage.h>
 
#include <QApplication>
#include <itksys/SystemTools.hxx>
 
#include <mitkIOUtil.h>
 
//##Documentation
//## @brief Load image (nrrd format) and display it in a 2D view
int main(int argc, char *argv[])
{
  QApplication qtapplication(argc, argv);
 
  if (argc < 2)
  {
    fprintf(stderr, "Usage:   %s [filename] \n\n", itksys::SystemTools::GetFilenameName(argv[0]).c_str());
    return 1;
  }
 
  // Register Qmitk-dependent global instances
  QmitkRegisterClasses();
 
  //*************************************************************************
  // Part I: Basic initialization
  //*************************************************************************
 
  // Create a DataStorage
  // The DataStorage manages all data objects. It is used by the
  // rendering mechanism to render all data objects
  // We use the standard implementation mitk::StandaloneDataStorage.
  mitk::StandaloneDataStorage::Pointer ds = mitk::StandaloneDataStorage::New();
 
  //*************************************************************************
  // Part II: Create some data by reading a file
  //*************************************************************************
 
  // Load datanode (eg. many image formats, surface formats, etc.)
  mitk::IOUtil::Load(argv[1], *ds);
 
  //*************************************************************************
  // Part IV: Create window and pass the datastorage to it
  //*************************************************************************
 
  // Create a RenderWindow
  QmitkRenderWindow renderWindow;
 
  // Tell the RenderWindow which (part of) the datastorage to render
  renderWindow.GetRenderer()->SetDataStorage(ds);
 
  // Initialize the RenderWindow
  auto geo = ds->ComputeBoundingGeometry3D(ds->GetAll());
  mitk::RenderingManager::GetInstance()->InitializeViews(geo);
  // mitk::RenderingManager::GetInstance()->InitializeViews();
 
  // Select a slice
  mitk::SliceNavigationController::Pointer sliceNaviController = renderWindow.GetSliceNavigationController();
  if (sliceNaviController)
    sliceNaviController->GetSlice()->SetPos(0);
 
  //*************************************************************************
  // Part V: Qt-specific initialization
  //*************************************************************************
  renderWindow.show();
  renderWindow.resize(256, 256);
 
  return qtapplication.exec();
}

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