ITK  5.0.0
Insight Segmentation and Registration Toolkit
SphinxExamples/src/Segmentation/LevelSetsv4Visualization/VisualizeStaticShi2DLevelSetLayers/Code.cxx
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include "vtkRenderWindowInteractor.h"
int main( int argc, char* argv[] )
{
if( argc != 3 )
{
std::cerr << "Missing Arguments" << std::endl;
std::cerr << argv[0] << std::endl;
std::cerr << "<Input Image> <Interactive (0 or 1)>" << std::endl;
return EXIT_FAILURE;
}
// Image Dimension
constexpr unsigned int Dimension = 2;
using InputPixelType = unsigned char;
// Read input image (to be processed).
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
reader->Update();
InputImageType::Pointer input = reader->GetOutput();
// Generate a binary mask that will be used as initialization for the level
// set evolution.
OtsuFilterType::Pointer otsu = OtsuFilterType::New();
otsu->SetInput( input );
otsu->SetNumberOfHistogramBins( 256 );
otsu->SetNumberOfThresholds( 1 );
RescaleType::Pointer rescaler = RescaleType::New();
rescaler->SetInput( otsu->GetOutput() );
rescaler->SetOutputMinimum( 0 );
rescaler->SetOutputMaximum( 1 );
// convert a binary mask to a level-set function
using BinaryImageToLevelSetType = itk::BinaryImageToLevelSetImageAdaptor< InputImageType,
LevelSetType >;
BinaryImageToLevelSetType::Pointer adaptor = BinaryImageToLevelSetType::New();
adaptor->SetInputImage( rescaler->GetOutput() );
adaptor->Initialize();
LevelSetType::Pointer levelSet = adaptor->GetModifiableLevelSet();
// Create the visualizer
VisualizationType::Pointer visualizer = VisualizationType::New();
visualizer->SetInputImage( input );
visualizer->SetLevelSet( levelSet );
visualizer->SetScreenCapture( true );
vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow( visualizer->GetRenderWindow() );
try
{
visualizer->Update();
}
catch( itk::ExceptionObject & error )
{
std::cerr << "Error: " << error << std::endl;
return EXIT_FAILURE;
}
bool interactive = ( atoi( argv[2] ) != 0 );
if( interactive )
{
renderWindowInteractor->Start();
}
return EXIT_SUCCESS;
}