ITK/Examples/Visualization/QuickViewDemo

QuickView.cxx

<source lang="cpp"> /*=========================================================================

*
*  Copyright Insight Software Consortium
*
*  Licensed under the Apache License, Version 2.0 (the "License");
*  you may not use this file except in compliance with the License.
*  You may obtain a copy of the License at
*
*         http://www.apache.org/licenses/LICENSE-2.0.txt
*
*  Unless required by applicable law or agreed to in writing, software
*  distributed under the License is distributed on an "AS IS" BASIS,
*  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
*  See the License for the specific language governing permissions and
*  limitations under the License.
*
*=========================================================================*/

1. include "QuickView.h"

1. include "itkRescaleIntensityImageFilter.h"
2. include "itkVectorRescaleIntensityImageFilter.h"
3. include "itkRGBToVectorImageAdaptor.h"
4. include "itkFlipImageFilter.h"

1. include "vtkVersion.h"

1. include "vtkRenderWindowInteractor.h"
2. include "vtkImageMapper3D.h"
3. include "vtkImageActor.h"
4. include "vtkActor2D.h"
5. include "vtkInteractorStyleImage.h"
6. include "vtkRenderer.h"
7. include "vtkCamera.h"
8. include "vtkTextProperty.h"
9. include "vtkTextMapper.h"

1. include "vtkCaptureScreen.h"
2. include "vtkPNGWriter.h"
3. include "vtkJPEGWriter.h"
4. include "vtkBMPWriter.h"
5. include "vtkTIFFWriter.h"

1. include "itkImageToVTKImageFilter.h"

typedef itk::Image<itk::RGBPixel<unsigned char>, 2> UnsignedCharRGBImageType; typedef itk::Image<itk::RGBPixel<float>, 2> FloatRGBImageType;

typedef itk::Image<unsigned char, 2> UnsignedCharImageType; typedef itk::Image<char, 2> CharImageType; typedef itk::Image<unsigned short, 2> UnsignedShortImageType; typedef itk::Image<short, 2> ShortImageType; typedef itk::Image<unsigned int, 2> UnsignedIntImageType; typedef itk::Image<int, 2> IntImageType; typedef itk::Image<unsigned long, 2> UnsignedLongImageType; typedef itk::Image<long, 2> LongImageType; typedef itk::Image<float, 2> FloatImageType; typedef itk::Image<double, 2> DoubleImageType;

template void QuickView::AddImage<CharImageType>(

 CharImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<UnsignedShortImageType>(

 UnsignedShortImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<ShortImageType>(

 ShortImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<UnsignedIntImageType>(

 UnsignedIntImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<IntImageType>(

 IntImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<UnsignedLongImageType>(

 UnsignedLongImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<LongImageType>(

 LongImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<FloatImageType>(

 FloatImageType *image,
 bool FlipVertical,
 std::string Description);

template void QuickView::AddImage<DoubleImageType>(

 DoubleImageType *image,
 bool FlipVertical,
 std::string Description);

template< > void QuickView::AddImage<UnsignedCharImageType>(

 UnsignedCharImageType *image,
 bool FlipVertical,
 std::string Description)

{

 if (FlipVertical)
   {
   typedef itk::FlipImageFilter< UnsignedCharImageType> FlipFilterType;
   FlipFilterType::Pointer flipper = FlipFilterType::New();
   bool flipAxes[3] = { false, true, false };
   flipper = FlipFilterType::New();
   flipper->SetFlipAxes(flipAxes);
   flipper->SetInput(image);
   flipper->Update();
   ImageInfo myImage(flipper->GetOutput(), Description);
   this->Images.push_back(myImage);
   }
 else
   {
   ImageInfo myImage(image, Description);
   this->Images.push_back(myImage);
   }

}

template<class TImage> void QuickView::AddImage(

 TImage *image,
 bool FlipVertical,
 std::string Description)

{

 typedef itk::RescaleIntensityImageFilter<TImage, UnsignedCharImageType >
   rescaleFilterType;

 typename rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
 rescaler->SetOutputMinimum(0);
 rescaler->SetOutputMaximum(255);
 rescaler->SetInput(image);
 rescaler->Update();

 this->AddImage(rescaler->GetOutput(), FlipVertical, Description);

}

template< > void QuickView::AddImage<UnsignedCharRGBImageType>(

 UnsignedCharRGBImageType *image,
 bool FlipVertical,
 std::string Description)

{

 if (FlipVertical)
   {
   typedef itk::FlipImageFilter< UnsignedCharRGBImageType> FlipFilterType;
   FlipFilterType::Pointer flipper = FlipFilterType::New();
   bool flipAxes[3] = { false, true, false };
   flipper = FlipFilterType::New();
   flipper->SetFlipAxes(flipAxes);
   flipper->SetInput(image);
   flipper->Update();
   RGBImageInfo myImage(flipper->GetOutput(), Description);
   this->RGBImages.push_back(myImage);
   }
 else
   {
   RGBImageInfo myImage(image, Description);
   this->RGBImages.push_back(myImage);
   }

}

template< > void QuickView::AddRGBImage<UnsignedCharRGBImageType>(

 UnsignedCharRGBImageType *image,
 bool FlipVertical,
 std::string Description)

{

 if (FlipVertical)
   {
   typedef itk::FlipImageFilter< UnsignedCharRGBImageType> FlipFilterType;
   FlipFilterType::Pointer flipper = FlipFilterType::New();
   bool flipAxes[3] = { false, true, false };
   flipper = FlipFilterType::New();
   flipper->SetFlipAxes(flipAxes);
   flipper->SetInput(image);
   flipper->Update();
   RGBImageInfo myImage(flipper->GetOutput(), Description);
   this->RGBImages.push_back(myImage);
   }
 else
   {
   RGBImageInfo myImage(image, Description);
   this->RGBImages.push_back(myImage);
   }

}

template< > void QuickView::AddRGBImage<FloatRGBImageType>(

 FloatRGBImageType *image,
 bool FlipVertical,
 std::string Description)

{

 typedef itk::RGBToVectorImageAdaptor<FloatRGBImageType> AdaptorType;
 AdaptorType::Pointer adaptor = AdaptorType::New();
 adaptor->SetImage(image);

 typedef itk::VectorRescaleIntensityImageFilter<AdaptorType, UnsignedCharRGBImageType > rescaleFilterType;
 rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
 rescaler->SetOutputMaximumMagnitude(255);
 rescaler->SetInput(adaptor);
 rescaler->Update();
 this->AddRGBImage(rescaler->GetOutput(), FlipVertical, Description);

}

template< > void QuickView::AddImage<FloatRGBImageType>(

 FloatRGBImageType *image,
 bool FlipVertical,
 std::string Description)

{

 typedef itk::RGBToVectorImageAdaptor<FloatRGBImageType> AdaptorType;
 AdaptorType::Pointer adaptor = AdaptorType::New();
 adaptor->SetImage(image);

 typedef itk::VectorRescaleIntensityImageFilter<AdaptorType, UnsignedCharRGBImageType > rescaleFilterType;
 rescaleFilterType::Pointer rescaler = rescaleFilterType::New();
 rescaler->SetOutputMaximumMagnitude(255);
 rescaler->SetInput(adaptor);
 rescaler->Update();
 this->AddRGBImage(rescaler->GetOutput(), FlipVertical, Description);

}

void QuickView::Visualize(bool interact) {

 unsigned int rendererSize = 300;
 unsigned int numberOfImages = this->Images.size() + this->RGBImages.size();

 // Setup the render window and interactor
 vtkSmartPointer<vtkRenderWindow> renderWindow =
   vtkSmartPointer<vtkRenderWindow>::New();
 renderWindow->SetSize(rendererSize * numberOfImages, rendererSize);

 vtkSmartPointer<vtkRenderWindowInteractor> interactor =
   vtkSmartPointer<vtkRenderWindowInteractor>::New();
 interactor->SetRenderWindow(renderWindow);

 // Render all of the images
 double step = 1./(static_cast<double>(numberOfImages));
 std::vector<double*> viewports;

 typedef itk::ImageToVTKImageFilter<itk::Image<unsigned char, 2> >
   ConnectorType;
 typedef itk::ImageToVTKImageFilter<itk::Image<itk::RGBPixel<unsigned char>, 2> >
   RGBConnectorType;
 std::vector<ConnectorType::Pointer>    connectors; // Force the connectors to persist (not lose scope) after each iteration of the loop
 std::vector<RGBConnectorType::Pointer> RGBconnectors; // Force the connectors to persist after each iteration of the loop

 double background[6] = {.4, .5, .6, .6, .5, .4};

 vtkSmartPointer<vtkCamera> sharedCamera =
   vtkSmartPointer<vtkCamera>::New();

 for(unsigned int i = 0; i < this->Images.size(); i++)
   {
   ConnectorType::Pointer connector = ConnectorType::New();
   connectors.push_back(connector);
   connector->SetInput(this->Images[i].m_Image);

   // (xmin, ymin, xmax, ymax)
   double viewport[4] =
     {static_cast<double>(i)*step, 0.0, static_cast<double>(i+1)*step, 1.0};
   viewports.push_back(viewport);
   vtkSmartPointer<vtkImageActor> actor =
     vtkSmartPointer<vtkImageActor>::New();

1. if VTK_MAJOR_VERSION <= 5

   actor->SetInput(connector->GetOutput());

1. else

   connector->Update();
   actor->GetMapper()->SetInputData(connector->GetOutput());

1. endif

   // Setup renderer
   vtkSmartPointer<vtkRenderer> renderer =
     vtkSmartPointer<vtkRenderer>::New();
   renderWindow->AddRenderer(renderer);
   renderer->SetViewport(viewports[i]);
   renderer->SetBackground(background);
   if (m_ShareCamera)
     {
     renderer->SetActiveCamera(sharedCamera);
     }
   else
     {
     vtkSmartPointer<vtkCamera> aCamera =
       vtkSmartPointer<vtkCamera>::New();
     renderer->SetActiveCamera(aCamera);
     }
   std::rotate(background, background + 1, background + 6);

   if (this->Images[i].m_Description != "")
     {
     vtkSmartPointer<vtkTextProperty> textProperty =
       vtkSmartPointer<vtkTextProperty>::New();
     textProperty->SetFontSize(10);
     textProperty->SetFontFamilyToCourier();
     textProperty->SetJustificationToCentered();

     vtkSmartPointer<vtkTextMapper> textMapper =
       vtkSmartPointer<vtkTextMapper>::New();
     textMapper->SetTextProperty(textProperty);
     textMapper->SetInput(this->Images[i].m_Description.c_str());

     vtkSmartPointer<vtkActor2D> textActor =
       vtkSmartPointer<vtkActor2D>::New();
     textActor->SetMapper(textMapper);
     textActor->SetPosition(rendererSize/2, 16);
     renderer->AddActor(textActor);
     }

   renderer->AddActor(actor);
   renderer->ResetCamera();
   }

 unsigned int j = 0;
 for(unsigned int i = this->Images.size();
     i < this->RGBImages.size() + this->Images.size();
     i++, j++)
   {
   RGBConnectorType::Pointer connector = RGBConnectorType::New();
   RGBconnectors.push_back(connector);
   connector->SetInput(this->RGBImages[j].m_Image);

   // (xmin, ymin, xmax, ymax)
   double viewport[4] =
     {static_cast<double>(i)*step, 0.0, static_cast<double>(i+1)*step, 1.0};
   viewports.push_back(viewport);
   vtkSmartPointer<vtkImageActor> actor =
     vtkSmartPointer<vtkImageActor>::New();

1. if VTK_MAJOR_VERSION <= 5

   actor->SetInput(connector->GetOutput());

1. else

   connector->Update();
   actor->GetMapper()->SetInputData(connector->GetOutput());

1. endif

   // Setup renderer
   vtkSmartPointer<vtkRenderer> renderer =
     vtkSmartPointer<vtkRenderer>::New();
   renderWindow->AddRenderer(renderer);
   renderer->SetViewport(viewports[i]);
   renderer->SetBackground(background);
   if (m_ShareCamera)
     {
     renderer->SetActiveCamera(sharedCamera);
     }
   else
     {
     vtkSmartPointer<vtkCamera> aCamera =
       vtkSmartPointer<vtkCamera>::New();
     renderer->SetActiveCamera(aCamera);
     }
   std::rotate(background, background + 1, background + 6);

   if (this->RGBImages[j].m_Description != "")
     {
     vtkSmartPointer<vtkTextProperty> textProperty =
       vtkSmartPointer<vtkTextProperty>::New();
     textProperty->SetFontSize(10);
     textProperty->SetFontFamilyToCourier();
     textProperty->SetJustificationToCentered();

     vtkSmartPointer<vtkTextMapper> textMapper =
       vtkSmartPointer<vtkTextMapper>::New();
     textMapper->SetTextProperty(textProperty);
     textMapper->SetInput(this->RGBImages[j].m_Description.c_str());

     vtkSmartPointer<vtkActor2D> textActor =
       vtkSmartPointer<vtkActor2D>::New();
     textActor->SetMapper(textMapper);
     textActor->SetPosition(rendererSize/2, 16);
     renderer->AddActor(textActor);
     }

   renderer->AddActor(actor);
   renderer->ResetCamera();
   }

 renderWindow->Render();

 if( m_Snapshot )
   {
   std::string filename;
   std::stringstream temp;
   temp << m_SnapshotPath << m_SnapshotPrefix << m_Counter << ".";
   filename = temp.str();
   filename.append( m_SnapshotExtension );

   if( m_SnapshotExtension == "png" )
     {
     vtkCaptureScreen< vtkPNGWriter > capture( renderWindow );
     capture( filename );
     }
   if( ( m_SnapshotExtension == "jpg" ) || ( m_SnapshotExtension == "jpeg" ) )
     {
     vtkCaptureScreen< vtkJPEGWriter > capture( renderWindow );
     capture( filename );
     }
   if( m_SnapshotExtension == "bmp" )
     {
     vtkCaptureScreen< vtkBMPWriter > capture( renderWindow );
     capture( filename );
     }
   if( ( m_SnapshotExtension == "tif" ) || ( m_SnapshotExtension == "tiff" ) )
     {
     vtkCaptureScreen< vtkTIFFWriter > capture( renderWindow );
     capture( filename );
     }
   m_Counter++;
   }

 vtkSmartPointer<vtkInteractorStyleImage> style =
   vtkSmartPointer<vtkInteractorStyleImage>::New();
 interactor->SetInteractorStyle(style);

 if (interact)
   {
   interactor->Start();
   }

} </source>

CMakeLists.txt

<syntaxhighlight lang="cmake"> cmake_minimum_required(VERSION 3.9.5)

project(QuickView)

find_package(ITK REQUIRED) include(${ITK_USE_FILE}) if (ITKVtkGlue_LOADED)

 find_package(VTK REQUIRED)
 include(${VTK_USE_FILE})

endif()

add_executable(QuickView MACOSX_BUNDLE QuickView.cxx)

if( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(QuickView ITKReview ${ITK_LIBRARIES})

else( "${ITK_VERSION_MAJOR}" LESS 4 )

 target_link_libraries(QuickView ${ITK_LIBRARIES})

endif( "${ITK_VERSION_MAJOR}" LESS 4 )

</syntaxhighlight>

Download and Build QuickView

Click here to download QuickView and its CMakeLists.txt file. Once the tarball QuickView.tar has been downloaded and extracted,

cd QuickView/build

• If ITK is installed:

cmake ..

• If ITK is not installed but compiled on your system, you will need to specify the path to your ITK build:

cmake -DITK_DIR:PATH=/home/me/itk_build ..

Build the project:

make

and run it:

./QuickView

WINDOWS USERS PLEASE NOTE: Be sure to add the ITK bin directory to your path. This will resolve the ITK dll's at run time.

Building All of the Examples

Many of the examples in the ITK Wiki Examples Collection require VTK. You can build all of the the examples by following these instructions. If you are a new VTK user, you may want to try the Superbuild which will build a proper ITK and VTK.

ItkVtkGlue

ITK >= 4

For examples that use QuickView (which depends on VTK), you must have built ITK with Module_ITKVtkGlue=ON.

ITK < 4

Some of the ITK Examples require VTK to display the images. If you download the entire ITK Wiki Examples Collection, the ItkVtkGlue directory will be included and configured. If you wish to just build a few examples, then you will need to download ItkVtkGlue and build it. When you run cmake it will ask you to specify the location of the ItkVtkGlue binary directory.