ImageMirrorPad
VTKExamples/Cxx/Images/ImageMirrorPad
Description
This example shows how to enlarge an image and fill in the padded edges by mirroring the original pixels.
Code
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;
}
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)
target_link_libraries(ImageMirrorPad ${VTK_LIBRARIES})
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.