VTK/Examples/Cxx/Images/ImageMirrorPad

From KitwarePublic
< VTK‎ | Examples‎ | Cxx
Jump to navigationJump to search
VTK Examples Baseline Images TestImageMirrorPad.png

This example shows how to enlarge an image and fill in the padded edges by mirroring the original pixels.

ImageMirrorPad.cxx

#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageMirrorPad.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkImageActor.h>

int main(int, char *[])
{
  // Create an image
  vtkSmartPointer<vtkImageCanvasSource2D> source = 
    vtkSmartPointer<vtkImageCanvasSource2D>::New();
  source->SetExtent(0, 20, 0, 20, 0, 0);
  source->SetScalarTypeToUnsignedChar();
  source->SetDrawColor(0.0, 0.0, 0.0, 1.0);
  source->FillBox(-VTK_INT_MAX, VTK_INT_MAX, -VTK_INT_MAX, VTK_INT_MAX);
  source->SetDrawColor(255.0, 0.0, 0.0, 0.5);
  source->DrawCircle(10, 10, 5);
  source->Update();
  
  vtkSmartPointer<vtkImageMirrorPad> mirrorPadFilter = 
    vtkSmartPointer<vtkImageMirrorPad>::New();
  mirrorPadFilter->SetInputConnection(source->GetOutputPort());
  mirrorPadFilter->SetOutputWholeExtent(-10, 30, -10, 30, 0, 0);
  mirrorPadFilter->Update();
  
  // Create an actor
  vtkSmartPointer<vtkImageActor> actor = 
    vtkSmartPointer<vtkImageActor>::New();
  actor->GetMapper()->SetInputConnection(
    mirrorPadFilter->GetOutputPort());
 
  // Visualize
  vtkSmartPointer<vtkRenderer> renderer = 
      vtkSmartPointer<vtkRenderer>::New();
  renderer->AddActor(actor);
  renderer->ResetCamera();
 
  vtkSmartPointer<vtkRenderWindow> renderWindow = 
    vtkSmartPointer<vtkRenderWindow>::New();
  renderWindow->AddRenderer ( renderer );
 
  vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor = 
    vtkSmartPointer<vtkRenderWindowInteractor>::New();
 
  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(ImageMirrorPad)

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

add_executable(ImageMirrorPad MACOSX_BUNDLE ImageMirrorPad.cxx)

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

Download and Build ImageMirrorPad

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

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

cd ImageMirrorPad/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:

./ImageMirrorPad

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.

Make a prettier image.