ImageToPolyDataFilter
VTKExamples/Cxx/Images/ImageToPolyDataFilter
Code
ImageToPolyDataFilter.cxx
#include <vtkActor.h>
#include <vtkLookupTable.h>
#include <vtkPolyDataMapper.h>
#include <vtkProperty.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>
#include <vtkImageToPolyDataFilter.h>
#include <vtkImageQuantizeRGBToIndex.h>
#include <vtkCamera.h>
#include <vtkPNGReader.h>
#include <vtkTriangleFilter.h>
int main(int argc, char *argv[])
{
if(argc < 2)
{
std::cerr << "Required arguments: filename.png" << std::endl;
return EXIT_FAILURE;
}
vtkSmartPointer<vtkPNGReader> reader =
vtkSmartPointer<vtkPNGReader>::New();
reader->SetFileName(argv[1]);
vtkSmartPointer<vtkImageQuantizeRGBToIndex> quant =
vtkSmartPointer<vtkImageQuantizeRGBToIndex>::New();
quant->SetInputConnection(reader->GetOutputPort());
quant->SetNumberOfColors(16);
vtkSmartPointer<vtkImageToPolyDataFilter> i2pd =
vtkSmartPointer<vtkImageToPolyDataFilter>::New();
i2pd->SetInputConnection(quant->GetOutputPort());
i2pd->SetLookupTable(quant->GetLookupTable());
i2pd->SetColorModeToLUT();
i2pd->SetOutputStyleToPolygonalize();
i2pd->SetError(0);
i2pd->DecimationOn();
i2pd->SetDecimationError(0.0);
i2pd->SetSubImageSize(25);
// Need a triangle filter because the polygons are complex and concave
vtkSmartPointer<vtkTriangleFilter> tf =
vtkSmartPointer<vtkTriangleFilter>::New();
tf->SetInputConnection(i2pd->GetOutputPort());
vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(tf->GetOutputPort());
vtkSmartPointer<vtkActor> actor =
vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetRepresentationToWireframe();
// Visualize
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
vtkSmartPointer<vtkRenderWindowInteractor> interactor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
interactor->SetRenderWindow(renderWindow);
renderer->AddActor(actor);
renderer->SetBackground(1, 1, 1);
renderWindow->SetSize(300, 250);
interactor->Initialize();
interactor->Start();
return EXIT_SUCCESS;
}
CMakeLists.txt
cmake_minimum_required(VERSION 2.8)
PROJECT(ImageToPolyDataFilter)
find_package(VTK REQUIRED)
include(${VTK_USE_FILE})
add_executable(ImageToPolyDataFilter MACOSX_BUNDLE ImageToPolyDataFilter.cxx)
target_link_libraries(ImageToPolyDataFilter ${VTK_LIBRARIES})
Download and Build ImageToPolyDataFilter
Click here to download ImageToPolyDataFilter and its CMakeLists.txt file. Once the tarball ImageToPolyDataFilter.tar has been downloaded and extracted,
cd ImageToPolyDataFilter/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:
./ImageToPolyDataFilter
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.