|
|
| (5 intermediate revisions by 2 users not shown) |
| Line 1: |
Line 1: |
| How to set a reasonable Threshold for the output edges?
| | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions. |
| | }} |
|
| |
|
| ==CannyEdgeDetectionImageFilter.cxx==
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| <source lang="cpp">
| |
| #include "itkImage.h"
| |
| #include "itkImageFileReader.h"
| |
| #include "itkRescaleIntensityImageFilter.h"
| |
| #include "itkCastImageFilter.h"
| |
| #include "itkCannyEdgeDetectionImageFilter.h"
| |
| | |
| #include <itkImageToVTKImageFilter.h>
| |
| | |
| #include "vtkImageViewer.h"
| |
| #include "vtkRenderWindowInteractor.h"
| |
| #include "vtkSmartPointer.h"
| |
| #include "vtkImageActor.h"
| |
| #include "vtkInteractorStyleImage.h"
| |
| #include "vtkRenderer.h"
| |
| | |
| int main(int argc, char *argv[])
| |
| {
| |
| if(argc < 2)
| |
| {
| |
| std::cerr << "Required: filename" << std::endl;
| |
| return EXIT_FAILURE;
| |
| }
| |
| | |
| typedef itk::Image<unsigned char, 2> UnsignedCharImageType;
| |
| typedef itk::Image<float, 2> FloatImageType;
| |
| | |
| typedef itk::ImageFileReader<UnsignedCharImageType> ReaderType;
| |
| ReaderType::Pointer reader = ReaderType::New();
| |
| reader->SetFileName(argv[1]);
| |
| reader->Update();
| |
| | |
| typedef itk::CastImageFilter< UnsignedCharImageType, FloatImageType > CastFilterType;
| |
| CastFilterType::Pointer castFilter = CastFilterType::New();
| |
| castFilter->SetInput(reader->GetOutput());
| |
| | |
| typedef itk::CannyEdgeDetectionImageFilter <FloatImageType, FloatImageType>
| |
| CannyEdgeDetectionImageFilterType;
| |
| | |
| CannyEdgeDetectionImageFilterType::Pointer cannyFilter
| |
| = CannyEdgeDetectionImageFilterType::New();
| |
| cannyFilter->SetInput(castFilter->GetOutput());
| |
| cannyFilter->Update();
| |
| | |
| typedef itk::CastImageFilter< FloatImageType, UnsignedCharImageType > OutputCastFilterType;
| |
| OutputCastFilterType::Pointer outputCastFilter = OutputCastFilterType::New();
| |
| outputCastFilter->SetInput(cannyFilter->GetOutput());
| |
| | |
| typedef itk::RescaleIntensityImageFilter< UnsignedCharImageType, UnsignedCharImageType > RescaleFilterType;
| |
| RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
| |
| rescaleFilter->SetInput(outputCastFilter->GetOutput());
| |
| rescaleFilter->SetOutputMinimum(0);
| |
| rescaleFilter->SetOutputMaximum(255);
| |
|
| |
| // Visualize first image
| |
| typedef itk::ImageToVTKImageFilter<UnsignedCharImageType> ConnectorType;
| |
| ConnectorType::Pointer originalConnector = ConnectorType::New();
| |
| originalConnector->SetInput(reader->GetOutput());
| |
| | |
| vtkSmartPointer<vtkImageActor> originalActor =
| |
| vtkSmartPointer<vtkImageActor>::New();
| |
| originalActor->SetInput(originalConnector->GetOutput());
| |
| | |
| // Visualize edge image
| |
| ConnectorType::Pointer cannyConnector = ConnectorType::New();
| |
| cannyConnector->SetInput(rescaleFilter->GetOutput());
| |
| | |
| vtkSmartPointer<vtkImageActor> cannyActor =
| |
| vtkSmartPointer<vtkImageActor>::New();
| |
| cannyActor->SetInput(cannyConnector->GetOutput());
| |
| | |
| // There will be one render window
| |
| vtkSmartPointer<vtkRenderWindow> renderWindow =
| |
| vtkSmartPointer<vtkRenderWindow>::New();
| |
| renderWindow->SetSize(600, 300);
| |
| | |
| vtkSmartPointer<vtkRenderWindowInteractor> interactor =
| |
| vtkSmartPointer<vtkRenderWindowInteractor>::New();
| |
| interactor->SetRenderWindow(renderWindow);
| |
| | |
| // Define viewport ranges
| |
| // (xmin, ymin, xmax, ymax)
| |
| double leftViewport[4] = {0.0, 0.0, 0.5, 1.0};
| |
| double rightViewport[4] = {0.5, 0.0, 1.0, 1.0};
| |
| | |
| // Setup both renderers
| |
| 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);
| |
| | |
| // Add the sphere to the left and the cube to the right
| |
| leftRenderer->AddActor(originalActor);
| |
| rightRenderer->AddActor(cannyActor);
| |
| | |
| leftRenderer->ResetCamera();
| |
| rightRenderer->ResetCamera();
| |
| | |
| renderWindow->Render();
| |
| | |
| vtkSmartPointer<vtkInteractorStyleImage> style =
| |
| vtkSmartPointer<vtkInteractorStyleImage>::New();
| |
| interactor->SetInteractorStyle(style);
| |
| | |
| interactor->Start();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| </source>
| |
| | |
| ==CMakeLists.txt==
| |
| <source lang="cmake">
| |
| cmake_minimum_required(VERSION 2.6)
| |
| | |
| PROJECT(CannyEdgeDetectionImageFilter)
| |
| | |
| include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
| |
| | |
| FIND_PACKAGE(VTK REQUIRED)
| |
| INCLUDE(${VTK_USE_FILE})
| |
| | |
| FIND_PACKAGE(ITK REQUIRED)
| |
| INCLUDE(${ITK_USE_FILE})
| |
| | |
| ADD_EXECUTABLE(CannyEdgeDetectionImageFilter CannyEdgeDetectionImageFilter.cxx)
| |
| TARGET_LINK_LIBRARIES(CannyEdgeDetectionImageFilter
| |
| vtkHybrid
| |
| ITKBasicFilters ITKCommon ITKIO)
| |
| | |
| </source>
| |
