VTK/Examples/Cxx/IO/ReadPNM

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VTK Examples Baseline IO TestReadPNM.png

ReadPNM.cxx

#include <vtkSmartPointer.h>
#include <vtkImageViewer2.h>
#include <vtkPNMReader.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
 
int main(int argc, char* argv[])
{
  //Verify input arguments
  if ( argc != 2 )
    {
    std::cout << "Usage: " << argv[0]
              << " Filename(.pnm)" << std::endl;
    return EXIT_FAILURE;
    }
 
  //Read the image
  vtkSmartPointer<vtkPNMReader> reader =
    vtkSmartPointer<vtkPNMReader>::New();
  reader->SetFileName ( argv[1] );
 
  // Visualize
  vtkSmartPointer<vtkImageViewer2> imageViewer =
    vtkSmartPointer<vtkImageViewer2>::New();
  imageViewer->SetInputConnection(reader->GetOutputPort());
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
  imageViewer->SetupInteractor(renderWindowInteractor);
  imageViewer->Render();
  imageViewer->GetRenderer()->ResetCamera();
  imageViewer->Render();
 
  renderWindowInteractor->Start();
 
  return EXIT_SUCCESS;
}

CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
 
PROJECT(ReadPNM)
 
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
 
add_executable(ReadPNM MACOSX_BUNDLE ReadPNM.cxx)
 
if(VTK_LIBRARIES)
  target_link_libraries(ReadPNM ${VTK_LIBRARIES})
else()
  target_link_libraries(ReadPNM vtkHybrid vtkWidgets)
endif()

Download and Build ReadPNM

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

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

cd ReadPNM/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:

./ReadPNM

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.