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| <div class="floatcenter">[[File:ITK_Examples_Baseline_ImageProcessing_TestZeroCrossingImageFilter.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| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| ==ZeroCrossingImageFilter.cxx==
| | }} |
| <source lang="cpp">
| |
| #include "itkImageFileReader.h"
| |
| #include "itkZeroCrossingImageFilter.h"
| |
| | |
| #include "itksys/SystemTools.hxx"
| |
| #include <sstream>
| |
| | |
| #include "QuickView.h"
| |
| | |
| typedef itk::Image<float, 2> ImageType;
| |
| | |
| static void CreateImage(ImageType::Pointer image);
| |
| | |
| int main(int argc, char *argv[])
| |
| { | |
| ImageType::Pointer image = ImageType::New();
| |
| if (argc < 2)
| |
| {
| |
| CreateImage(image);
| |
| }
| |
| else
| |
| {
| |
| typedef itk::ImageFileReader<ImageType> ReaderType;
| |
| ReaderType::Pointer reader = ReaderType::New();
| |
| reader->SetFileName(argv[1]);
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| reader->Update();
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| image = reader->GetOutput();
| |
| }
| |
| | |
| typedef itk::ZeroCrossingImageFilter< ImageType, ImageType > FilterType;
| |
| FilterType::Pointer filter = FilterType::New();
| |
| filter->SetInput(image);
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| filter->SetBackgroundValue(0);
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| filter->SetForegroundValue(255);
| |
|
| |
| QuickView viewer;
| |
| viewer.AddImage(
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| image.GetPointer(),true,
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| argc > 1 ? itksys::SystemTools::GetFilenameName(argv[1]) : "Generated image");
| |
| | |
| std::stringstream desc;
| |
| desc << "Zero Crossing";
| |
| viewer.AddImage(
| |
| filter->GetOutput(),
| |
| true,
| |
| desc.str());
| |
| | |
| viewer.Visualize();
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateImage(ImageType::Pointer image)
| |
| {
| |
| itk::Index<2> start;
| |
| start.Fill(0);
| |
| | |
| itk::Size<2> size;
| |
| size.Fill(100);
| |
| | |
| itk::ImageRegion<2> region(start,size); | |
|
| |
| image->SetRegions(region);
| |
| image->Allocate();
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| image->FillBuffer(-1);
| |
|
| |
| // Make half of the image negative
| |
| for(unsigned int i = 0; i < 100; ++i)
| |
| {
| |
| for(unsigned int j = 0; j < 50; ++j)
| |
| {
| |
| itk::Index<2> index;
| |
| index[0] = i;
| |
| index[1] = j;
| |
| image->SetPixel(index, 1);
| |
| }
| |
| }
| |
| }
| |
| </source>
| |
| | |
| {{ITKCMakeLists|{{SUBPAGENAME}}}}
| |
