ImageMirrorPad
vtk-examples/Cxx/Images/ImageMirrorPad
Description¶
This example shows how to enlarge an image and fill in the padded edges by mirroring the original pixels.
Question
If you have a question about this example, please use the VTK Discourse Forum
Code¶
ImageMirrorPad.cxx
#include <vtkImageActor.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageData.h>
#include <vtkImageMapper3D.h>
#include <vtkImageMirrorPad.h>
#include <vtkNamedColors.h>
#include <vtkNew.h>
#include <vtkProperty.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkType.h>
int main(int, char*[])
{
vtkNew<vtkNamedColors> colors;
// Create an image
vtkNew<vtkImageCanvasSource2D> source;
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();
vtkNew<vtkImageMirrorPad> mirrorPadFilter;
mirrorPadFilter->SetInputConnection(source->GetOutputPort());
mirrorPadFilter->SetOutputWholeExtent(-10, 30, -10, 30, 0, 0);
mirrorPadFilter->Update();
// Create an actor
vtkNew<vtkImageActor> actor;
actor->GetMapper()->SetInputConnection(mirrorPadFilter->GetOutputPort());
// Visualize
vtkNew<vtkRenderer> renderer;
renderer->AddActor(actor);
renderer->ResetCamera();
renderer->SetBackground(colors->GetColor3d("Salmon").GetData());
vtkNew<vtkRenderWindow> renderWindow;
renderWindow->AddRenderer(renderer);
renderWindow->SetWindowName("ImageMirrorPad");
vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
renderWindowInteractor->SetRenderWindow(renderWindow);
renderWindow->Render();
renderWindowInteractor->Initialize();
renderWindowInteractor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt¶
cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
project(ImageMirrorPad)
find_package(VTK COMPONENTS
vtkCommonColor
vtkCommonCore
vtkCommonDataModel
vtkImagingCore
vtkImagingSources
vtkInteractionStyle
vtkRenderingContextOpenGL2
vtkRenderingCore
vtkRenderingFreeType
vtkRenderingGL2PSOpenGL2
vtkRenderingOpenGL2
QUIET
)
if (NOT VTK_FOUND)
message("Skipping ImageMirrorPad: ${VTK_NOT_FOUND_MESSAGE}")
return ()
endif()
message (STATUS "VTK_VERSION: ${VTK_VERSION}")
if (VTK_VERSION VERSION_LESS "8.90.0")
# old system
include(${VTK_USE_FILE})
add_executable(ImageMirrorPad MACOSX_BUNDLE ImageMirrorPad.cxx )
target_link_libraries(ImageMirrorPad PRIVATE ${VTK_LIBRARIES})
else ()
# include all components
add_executable(ImageMirrorPad MACOSX_BUNDLE ImageMirrorPad.cxx )
target_link_libraries(ImageMirrorPad PRIVATE ${VTK_LIBRARIES})
# vtk_module_autoinit is needed
vtk_module_autoinit(
TARGETS ImageMirrorPad
MODULES ${VTK_LIBRARIES}
)
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
Be sure to add the VTK bin directory to your path. This will resolve the VTK dll's at run time.