ITK/Examples/ImageProcessing/BinaryThresholdImageFilter: Difference between revisions

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<div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestBinaryThresholdImageFilter.png]]</div>
{{warning|1=The media wiki content on this page is no longer maintained.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.
This example demonstrates how to threshold an image using a BinaryThresholdImageFilter. The output of this filter is binary - InsideValue if the pixel value falls inside the threshold window, or OutsideValue otherwise. The output shows the original image and the thresholded image.
}}


==BinaryThresholdImageFilter.cxx==
[https://itk.org/ITKExamples[ITK Sphinx Examples]]
<source lang="cpp">
#include "itkImage.h"
#include "itkBinaryThresholdImageFilter.h"
#include <itkImageFileReader.h>
 
#include "QuickView.h"
 
int main(int argc, char *argv[])
{
  if(argc < 2)
    {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0] << " inputImageFile [lowerThreshold] [upperThreshold]" << std::endl;
    return EXIT_FAILURE;
    }
   
  int lowerThreshold = 10;
  int upperThreshold = 30;
  if (argc > 2)
    {
    lowerThreshold = atoi(argv[2]);
    }
  if (argc > 3)
    {
    upperThreshold = atoi(argv[3]);
    }
 
  typedef itk::Image<unsigned char, 2>  ImageType;
  typedef itk::ImageFileReader<ImageType> ReaderType;
 
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(argv[1]);
 
  typedef itk::BinaryThresholdImageFilter <ImageType, ImageType>
    BinaryThresholdImageFilterType;
 
  BinaryThresholdImageFilterType::Pointer thresholdFilter
    = BinaryThresholdImageFilterType::New();
  thresholdFilter->SetInput(reader->GetOutput());
  thresholdFilter->SetLowerThreshold(lowerThreshold);
  thresholdFilter->SetUpperThreshold(upperThreshold);
  thresholdFilter->SetInsideValue(255);
  thresholdFilter->SetOutsideValue(0);
 
  QuickView viewer;
  viewer.AddImage<ImageType>(
    reader->GetOutput(),true,
    itksys::SystemTools::GetFilenameName(argv[1])); 
  std::stringstream desc;
  desc << "Threshold\nlower = " << lowerThreshold
      << " upper = " << upperThreshold;
  viewer.AddImage<ImageType>(
    thresholdFilter->GetOutput(),
    true,
    desc.str());
  viewer.Visualize();
 
  return EXIT_SUCCESS;
}
</source>
 
==CMakeLists.txt==
<source lang="cmake">
cmake_minimum_required(VERSION 2.6)
 
PROJECT(BinaryThresholdImageFilter)
 
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(BinaryThresholdImageFilter BinaryThresholdImageFilter.cxx)
TARGET_LINK_LIBRARIES(BinaryThresholdImageFilter
vtkHybrid
ITKBasicFilters ITKCommon ITKIO)
 
</source>

Latest revision as of 19:35, 31 May 2019

Warning: 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.

[ITK Sphinx Examples]