VTK/Examples/Cxx/Broken/Images/ImageIdealLowPass
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ImageIdealLowPass.cxx
#include <vtkSmartPointer.h>
#include <vtkImageData.h>
#include <vtkImageCanvasSource2D.h>
#include <vtkImageIdealLowPass.h>
#include <vtkImageActor.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkJPEGReader.h>
#include <vtkImageFFT.h>
#include <vtkImageRFFT.h>
#include <vtkImageCast.h>
int main(int argc, char *argv[])
{
if(argc < 2)
{
std::cerr << "Required: filename.jpg" << std::endl;
return EXIT_FAILURE;
}
// Create an image
vtkSmartPointer<vtkJPEGReader> reader =
vtkSmartPointer<vtkJPEGReader>::New();
reader->SetFileName(argv[1]);
reader->Update();
vtkSmartPointer<vtkImageFFT> fftFilter =
vtkSmartPointer<vtkImageFFT>::New();
fftFilter->SetInputConnection(reader->GetOutputPort());
fftFilter->Update();
vtkSmartPointer<vtkImageIdealLowPass> lowPassFilter =
vtkSmartPointer<vtkImageIdealLowPass>::New();
lowPassFilter->SetInputConnection(fftFilter->GetOutputPort());
lowPassFilter->Update();
vtkSmartPointer<vtkImageIdealLowPass> rfftFilter =
vtkSmartPointer<vtkImageIdealLowPass>::New();
rfftFilter->SetInputConnection(lowPassFilter->GetOutputPort());
rfftFilter->Update();
vtkSmartPointer<vtkImageCast> castFilter =
vtkSmartPointer<vtkImageCast>::New();
castFilter->SetInputConnection(rfftFilter->GetOutputPort());
castFilter->SetOutputScalarTypeToUnsignedChar();
castFilter->Update();
vtkSmartPointer<vtkImageActor> originalActor =
vtkSmartPointer<vtkImageActor>::New();
originalActor->SetInput(reader->GetOutput());
vtkSmartPointer<vtkImageActor> erodedActor =
vtkSmartPointer<vtkImageActor>::New();
erodedActor->SetInput(castFilter->GetOutput());
// Visualize
double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->SetSize(600, 300);
vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow(renderWindow);
vtkSmartPointer<vtkRenderer> leftRenderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(leftRenderer);
leftRenderer->SetViewport(leftViewport);
leftRenderer->SetBackground(.6, .5, .4);
vtkSmartPointer<vtkRenderer> rightRenderer =
vtkSmartPointer<vtkRenderer>::New();
renderWindow->AddRenderer(rightRenderer);
rightRenderer->SetViewport(rightViewport);
rightRenderer->SetBackground(.4, .5, .6);
leftRenderer->AddActor(originalActor);
rightRenderer->AddActor(erodedActor);
leftRenderer->ResetCamera();
rightRenderer->ResetCamera();
renderWindow->Render();
interactor->Start();
return EXIT_SUCCESS;
}
Please try the new VTKExamples website.
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ImageIdealLowPass)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ImageIdealLowPass MACOSX_BUNDLE ImageIdealLowPass.cxx)
if(VTK_LIBRARIES)
target_link_libraries(ImageIdealLowPass ${VTK_LIBRARIES})
else()
target_link_libraries(ImageIdealLowPass vtkHybrid vtkWidgets)
endif()
Download and Build ImageIdealLowPass
Click here to download ImageIdealLowPass. and its CMakeLists.txt file.
Once the tarball ImageIdealLowPass.tar has been downloaded and extracted,
cd ImageIdealLowPass/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:
./ImageIdealLowPass
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.