ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageLabel/LabelContoursOfConnectComponent/Code.cxx
/*=========================================================================
*
* Copyright NumFOCUS
*
* 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 "itkImage.h"
#include "itksys/SystemTools.hxx"
#include <sstream>
#ifdef ENABLE_QUICKVIEW
# include "QuickView.h"
#endif
namespace
{
using PixelType = unsigned char;
using RGBPixelType = itk::RGBPixel<unsigned char>;
using ImageType = itk::Image<PixelType, 2>;
using RGBImageType = itk::Image<RGBPixelType, 2>;
} // namespace
static void
CreateImage(ImageType::Pointer image);
int
main(int argc, char * argv[])
{
// Create or read an image
ImageType::Pointer image;
if (argc < 2)
{
image = ImageType::New();
CreateImage(image.GetPointer());
}
else
{
using ReaderType = itk::ImageFileReader<ImageType>;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(argv[1]);
reader->Update();
image = reader->GetOutput();
}
// Generate connected components
using ConnectedComponentImageFilterType = itk::ConnectedComponentImageFilter<ImageType, ImageType>;
ConnectedComponentImageFilterType::Pointer connectedComponentImageFilter = ConnectedComponentImageFilterType::New();
connectedComponentImageFilter->SetInput(image);
// Generate contours for each component
using LabelContourImageFilterType = itk::LabelContourImageFilter<ImageType, ImageType>;
LabelContourImageFilterType::Pointer labelContourImageFilter = LabelContourImageFilterType::New();
labelContourImageFilter->SetInput(connectedComponentImageFilter->GetOutput());
RGBFilterType::Pointer rgbFilter = RGBFilterType::New();
rgbFilter->SetInput(labelContourImageFilter->GetOutput());
#ifdef ENABLE_QUICKVIEW
QuickView viewer;
viewer.AddImage(
image.GetPointer(), true, argc > 1 ? itksys::SystemTools::GetFilenameName(argv[1]) : "Generated image");
std::stringstream desc;
desc << "LabelContourImageFilter";
viewer.AddRGBImage(rgbFilter->GetOutput(), true, desc.str());
viewer.Visualize();
#endif
return EXIT_SUCCESS;
}
void
CreateImage(ImageType::Pointer image)
{
// Create an image with 2 connected components
start[0] = 0;
start[1] = 0;
unsigned int NumRows = 200;
unsigned int NumCols = 300;
size[0] = NumRows;
size[1] = NumCols;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
// Make a square
for (unsigned int r = 20; r < 80; r++)
{
for (unsigned int c = 30; c < 100; c++)
{
pixelIndex[0] = r;
pixelIndex[1] = c;
image->SetPixel(pixelIndex, 255);
}
}
// Make another square
for (unsigned int r = 100; r < 130; r++)
{
for (unsigned int c = 115; c < 160; c++)
{
pixelIndex[0] = r;
pixelIndex[1] = c;
image->SetPixel(pixelIndex, 255);
}
}
}
itk::RGBPixel
Represent Red, Green and Blue components for color images.
Definition: itkRGBPixel.h:58
itk::LabelContourImageFilter
Labels the pixels on the border of the objects in a labeled image.
Definition: itkLabelContourImageFilter.h:54
itk::ScalarToRGBColormapImageFilter
Implements pixel-wise intensity->rgb mapping operation on one image.
Definition: itkScalarToRGBColormapImageFilter.h:131
itkImageFileReader.h
itk::GTest::TypedefsAndConstructors::Dimension2::SizeType
ImageBaseType::SizeType SizeType
Definition: itkGTestTypedefsAndConstructors.h:49
itkImage.h
itk::ScalarToRGBColormapImageFilterEnums::RGBColormapFilter::Jet
itk::ImageFileReader
Data source that reads image data from a single file.
Definition: itkImageFileReader.h:75
itk::GTest::TypedefsAndConstructors::Dimension2::IndexType
ImageBaseType::IndexType IndexType
Definition: itkGTestTypedefsAndConstructors.h:50
QuickView::AddRGBImage
void AddRGBImage(TImage *, bool FlipVertical=true, std::string Description="")
QuickView.h
itkLabelContourImageFilter.h
QuickView::AddImage
void AddImage(TImage *, bool FlipVertical=true, std::string Description="")
itk::GTest::TypedefsAndConstructors::Dimension2::RegionType
ImageBaseType::RegionType RegionType
Definition: itkGTestTypedefsAndConstructors.h:54
itk::Size::SetSize
void SetSize(const SizeValueType val[VDimension])
Definition: itkSize.h:179
itkScalarToRGBColormapImageFilter.h
itkConnectedComponentImageFilter.h
QuickView
A convenient class to render itk images with vtk.
Definition: QuickView.h:111
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
QuickView::Visualize
void Visualize(bool interact=true)
itk::ConnectedComponentImageFilter
Label the objects in a binary image.
Definition: itkConnectedComponentImageFilter.h:59