ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/MathematicalMorphology/RegionalMinimal/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"
using ImageType = itk::Image<unsigned char, 2>;
static void
CreateImage(ImageType::Pointer image);
int
main(int, char *[])
{
ImageType::Pointer image = ImageType::New();
CreateImage(image);
using RegionalMinimaImageFilterType = itk::RegionalMinimaImageFilter<ImageType, ImageType>;
RegionalMinimaImageFilterType::Pointer regionalMinimaImageFilter = RegionalMinimaImageFilterType::New();
regionalMinimaImageFilter->SetInput(image);
regionalMinimaImageFilter->Update();
using WriterType = itk::ImageFileWriter<ImageType>;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("input.png");
writer->SetInput(image);
writer->Update();
writer->SetFileName("output.png");
writer->SetInput(regionalMinimaImageFilter->GetOutput());
writer->Update();
return EXIT_SUCCESS;
}
void
CreateImage(ImageType::Pointer image)
{
start.Fill(0);
size[0] = 200;
size[1] = 300;
ImageType::RegionType region(start, size);
image->SetRegions(region);
image->Allocate();
// Make two intensity blobs
for (unsigned int r = 0; r < size[1]; r++)
{
for (unsigned int c = 0; c < size[0]; c++)
{
pixelIndex[0] = c;
pixelIndex[1] = r;
double c1 = c - 100.0;
double c2 = c - 200.0;
double rr = r - 100.0;
// purposely use 270,257 since it is > 255
double v1 = 270.0 - std::sqrt(rr * rr + c1 * c1);
double v2 = 257.0 - std::sqrt(rr * rr + c2 * c2);
double maxv = v1;
if (maxv < v2)
maxv = v2;
double val = maxv;
// Clip
if (val < 0.0)
val = 0.0;
if (val > 255.0)
val = 255.0;
image->SetPixel(pixelIndex, static_cast<unsigned char>(val));
}
}
}
itkRegionalMinimaImageFilter.h
itk::RegionalMinimaImageFilter
Produce a binary image where foreground is the regional minima of the input image.
Definition: itkRegionalMinimaImageFilter.h:52
itk::GTest::TypedefsAndConstructors::Dimension2::SizeType
ImageBaseType::SizeType SizeType
Definition: itkGTestTypedefsAndConstructors.h:49
itkImage.h
itk::Index::Fill
void Fill(IndexValueType value)
Definition: itkIndex.h:270
itk::GTest::TypedefsAndConstructors::Dimension2::IndexType
ImageBaseType::IndexType IndexType
Definition: itkGTestTypedefsAndConstructors.h:50
itk::ImageFileWriter
Writes image data to a single file.
Definition: itkImageFileWriter.h:87
itk::GTest::TypedefsAndConstructors::Dimension2::RegionType
ImageBaseType::RegionType RegionType
Definition: itkGTestTypedefsAndConstructors.h:54
itkImageFileWriter.h
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86