VTK/Examples/Cxx/Images/ImageNoiseSource

ImageNoiseSource.cxx

#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkImageNoiseSource.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkInteractorStyleImage.h>
#include <vtkRenderer.h>
#include <vtkImageActor.h>
#include <vtkImageCast.h>

int main(int, char *[])
{
  // Create an image of noise
  vtkSmartPointer<vtkImageNoiseSource> noiseSource = 
    vtkSmartPointer<vtkImageNoiseSource>::New();
  noiseSource->SetWholeExtent(0, 20, 0, 20, 0, 0);
  noiseSource->SetMinimum(0.0);
  noiseSource->SetMaximum(255.0);
  noiseSource->Update();

  vtkSmartPointer<vtkImageCast> castFilter =
    vtkSmartPointer<vtkImageCast>::New();
  castFilter->SetInputConnection(noiseSource->GetOutputPort());
  castFilter->SetOutputScalarTypeToUnsignedChar();
  castFilter->Update();
  
  // Create an actor
  vtkSmartPointer<vtkImageActor> actor =
    vtkSmartPointer<vtkImageActor>::New();
  actor->GetMapper()->SetInputConnection(castFilter->GetOutputPort());

  // Setup renderer
  vtkSmartPointer<vtkRenderer> renderer =
    vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);
  renderer->ResetCamera();

  // Setup render window
  vtkSmartPointer<vtkRenderWindow> renderWindow =
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer(renderer);

  // Setup render window interactor
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  vtkSmartPointer<vtkInteractorStyleImage> style =
    vtkSmartPointer<vtkInteractorStyleImage>::New();

  renderWindowInteractor->SetInteractorStyle(style);

  // Render and start interaction
  renderWindowInteractor->SetRenderWindow(renderWindow);
  renderWindowInteractor->Initialize();

  renderWindowInteractor->Start();
  return EXIT_SUCCESS;
}

Please try the new VTKExamples website.

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)

PROJECT(ImageNoiseSource)

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

add_executable(ImageNoiseSource MACOSX_BUNDLE ImageNoiseSource.cxx)

if(VTK_LIBRARIES)
  target_link_libraries(ImageNoiseSource ${VTK_LIBRARIES})
else()
  target_link_libraries(ImageNoiseSource vtkHybrid vtkWidgets)
endif()

Download and Build ImageNoiseSource

Click here to download ImageNoiseSource. and its CMakeLists.txt file.

Once the tarball ImageNoiseSource.tar has been downloaded and extracted,

cd ImageNoiseSource/build 

• If VTK is installed:

cmake ..

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

cmake -DVTK_DIR:PATH=/home/me/vtk_build ..

Build the project:

make

and run it:

./ImageNoiseSource

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