|
|
| (6 intermediate revisions by 2 users not shown) |
| Line 1: |
Line 1: |
| Output neither the minimum nor maximum of the correlation image is the "correct" result (the pixel that we extracted the patch to correlate).
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| | | }} |
| ==NormalizedCorrelationImageFilter.cxx==
| |
| <source lang="cpp">
| |
| #include "itkImage.h"
| |
| #include "itkImageFileReader.h"
| |
| #include "itkNormalizedCorrelationImageFilter.h"
| |
| #include "itkRegionOfInterestImageFilter.h"
| |
| #include "itkImageKernelOperator.h"
| |
| #include "itkRescaleIntensityImageFilter.h"
| |
| #include "itkImageFileWriter.h"
| |
| #include "itkMinimumMaximumImageCalculator.h"
| |
| #include "QuickView.h"
| |
| | |
| #include <iostream>
| |
| #include <string>
| |
| | |
| typedef itk::Image<float, 2> FloatImageType;
| |
| typedef itk::Image<unsigned char, 2> UnsignedCharImageType;
| |
| | |
| int main(int argc, char *argv[])
| |
| { | |
| if(argc < 2)
| |
| {
| |
| std::cerr << "Required: filename" << std::endl;
| |
| return EXIT_FAILURE;
| |
| }
| |
|
| |
| std::string filename = argv[1];
| |
|
| |
| typedef itk::ImageFileReader<FloatImageType> ReaderType;
| |
| | |
| // Read the image
| |
| ReaderType::Pointer reader = ReaderType::New();
| |
| reader->SetFileName(filename.c_str());
| |
| reader->Update();
| |
|
| |
| // Extract a small region
| |
| typedef itk::RegionOfInterestImageFilter< FloatImageType,
| |
| FloatImageType > ExtractFilterType;
| |
| | |
| ExtractFilterType::Pointer extractFilter = ExtractFilterType::New();
| |
| | |
| FloatImageType::IndexType start;
| |
| start.Fill(50);
| |
| | |
| FloatImageType::SizeType size;
| |
| size.Fill(100);
| |
| | |
| FloatImageType::RegionType desiredRegion(start,size);
| |
| | |
| extractFilter->SetRegionOfInterest(desiredRegion);
| |
| extractFilter->SetInput(reader->GetOutput());
| |
| extractFilter->Update();
| |
|
| |
| // Perform normalized correlation
| |
| // <input type, mask type (not used), output type>
| |
| typedef itk::NormalizedCorrelationImageFilter<FloatImageType, FloatImageType, FloatImageType> CorrelationFilterType;
| |
| | |
| itk::ImageKernelOperator<float> kernelOperator;
| |
| kernelOperator.SetImageKernel(extractFilter->GetOutput());
| |
| kernelOperator.CreateToRadius(extractFilter->GetOutput()->GetLargestPossibleRegion().GetSize());
| |
|
| |
| CorrelationFilterType::Pointer correlationFilter = CorrelationFilterType::New();
| |
| correlationFilter->SetInput(reader->GetOutput());
| |
| correlationFilter->SetTemplate(kernelOperator);
| |
| correlationFilter->Update();
| |
| | |
| typedef itk::MinimumMaximumImageCalculator <FloatImageType>
| |
| MinimumMaximumImageCalculatorType;
| |
| | |
| MinimumMaximumImageCalculatorType::Pointer minimumMaximumImageCalculatorFilter
| |
| = MinimumMaximumImageCalculatorType::New ();
| |
| minimumMaximumImageCalculatorFilter->SetImage(correlationFilter->GetOutput());
| |
| minimumMaximumImageCalculatorFilter->Compute();
| |
|
| |
| std::cout << "Maximum: " << minimumMaximumImageCalculatorFilter->GetIndexOfMaximum() << std::endl;
| |
| std::cout << "Minimum: " << minimumMaximumImageCalculatorFilter->GetIndexOfMinimum() << std::endl;
| |
| | |
| typedef itk::RescaleIntensityImageFilter< FloatImageType, UnsignedCharImageType > RescaleFilterType; | |
| typedef itk::ImageFileWriter<UnsignedCharImageType> WriterType;
| |
| {
| |
| RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
| |
| rescaleFilter->SetInput(correlationFilter->GetOutput());
| |
| rescaleFilter->SetOutputMinimum(0);
| |
| rescaleFilter->SetOutputMaximum(255);
| |
| rescaleFilter->Update();
| |
|
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetInput(rescaleFilter->GetOutput());
| |
| writer->SetFileName("correlation.png");
| |
| writer->Update();
| |
| }
| |
| | |
| {
| |
| RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
| |
| rescaleFilter->SetInput(extractFilter->GetOutput());
| |
| rescaleFilter->SetOutputMinimum(0);
| |
| rescaleFilter->SetOutputMaximum(255);
| |
| rescaleFilter->Update();
| |
|
| |
| WriterType::Pointer writer = WriterType::New();
| |
| writer->SetInput(rescaleFilter->GetOutput());
| |
| writer->SetFileName("patch.png");
| |
| writer->Update();
| |
| }
| |
|
| |
| QuickView viewer;
| |
| viewer.AddImage(reader->GetOutput());
| |
| viewer.AddImage(extractFilter->GetOutput());
| |
| viewer.AddImage(correlationFilter->GetOutput());
| |
| viewer.Visualize();
| |
| | |
| return EXIT_SUCCESS;
| |
| } | |
| | |
| </source>
| |
| | |
| ==CMakeLists.txt==
| |
| <source lang="cmake">
| |
| cmake_minimum_required(VERSION 2.6)
| |
| | |
| PROJECT(NormalizedCorrelationImageFilter)
| |
| | |
| include_directories(/home/doriad/ITKWikiExamples/ItkVtkGlue)
| |
| | |
| FIND_PACKAGE(VTK REQUIRED)
| |
| INCLUDE(${VTK_USE_FILE})
| |
| | |
| FIND_PACKAGE(ITK REQUIRED)
| |
| INCLUDE(${ITK_USE_FILE})
| |
| | |
| ADD_EXECUTABLE(NormalizedCorrelationImageFilter NormalizedCorrelationImageFilter.cpp /home/doriad/ITKWikiExamples/ItkVtkGlue/QuickView.cxx)
| |
| TARGET_LINK_LIBRARIES(NormalizedCorrelationImageFilter
| |
| vtkHybrid
| |
| ITKBasicFilters ITKCommon ITKIO)
| |
| | |
| </source>
| |
