# ShotNoise

VTKExamples/Cxx/ImageProcessing/ShotNoise

### Code

ShotNoise.cxx

    #include <vtkSmartPointer.h>
    #include <vtkImageCanvasSource2D.h>
    #include <vtkPNGWriter.h>

    int main (int argc, char *argv[])
    {
      vtkSmartPointer<vtkImageCanvasSource2D> imageCanvas =
        vtkSmartPointer<vtkImageCanvasSource2D>::New();

      imageCanvas->SetScalarTypeToUnsignedChar();
      imageCanvas->SetExtent(1, 256, 1, 256, 0, 0);
      imageCanvas->SetDrawColor(0.0);
      imageCanvas->FillBox(1, 256, 1, 256);
      imageCanvas->SetDrawColor(255.0);
      imageCanvas->FillBox(30, 225, 30, 225);
      imageCanvas->SetDrawColor(0.0);
      imageCanvas->FillBox(60, 195, 60, 195);
      imageCanvas->SetDrawColor(255.0);
      imageCanvas->FillTube(100, 100, 154, 154, 40.0);
      imageCanvas->SetDrawColor(0.0);
      imageCanvas->DrawSegment(45, 45, 45, 210);
      imageCanvas->DrawSegment(45, 210, 210, 210);
      imageCanvas->DrawSegment(210, 210, 210, 45);
      imageCanvas->DrawSegment(210, 45, 45, 45);
      imageCanvas->DrawSegment(100, 150, 150, 100);
      imageCanvas->DrawSegment(110, 160, 160, 110);
      imageCanvas->DrawSegment(90, 140, 140, 90);
      imageCanvas->DrawSegment(120, 170, 170, 120);
      imageCanvas->DrawSegment(80, 130, 130, 80);
      imageCanvas->Update();

      vtkSmartPointer<vtkPNGWriter> writer =
        vtkSmartPointer<vtkPNGWriter>::New();
      writer->SetInputConnection(imageCanvas->GetOutputPort());
      writer->SetFileName(argv[1]);
      writer->Write();
      return EXIT_SUCCESS;
      }

### CMakeLists.txt

    cmake_minimum_required(VERSION 2.8)

    PROJECT(ShotNoise)

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

    add_executable(ShotNoise MACOSX_BUNDLE ShotNoise.cxx )

    target_link_libraries(ShotNoise ${VTK_LIBRARIES})

### Download and Build ShotNoise

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

    cd ShotNoise/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:

    ./ShotNoise

WINDOWS USERS

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