ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/MathematicalMorphology/RegionalMaximal/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 RegionalMaximaImageFilter = itk::RegionalMaximaImageFilter<ImageType, ImageType>;
RegionalMaximaImageFilter::Pointer filter = RegionalMaximaImageFilter::New();
filter->SetInput(image);
using WriterType = itk::ImageFileWriter<ImageType>;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("intensityblobs.png");
writer->SetInput(image);
writer->Update();
writer->SetFileName("maximal.png");
writer->SetInput(filter->GetOutput());
writer->Update();
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] = NumCols;
size[1] = NumRows;
region.SetSize(size);
region.SetIndex(start);
image->SetRegions(region);
image->Allocate();
// Make two intensity blobs
for (unsigned int r = 0; r < NumRows; r++)
{
for (unsigned int c = 0; c < NumCols; 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;
if (val < 0.0)
val = 0.0;
if (val > 255.0)
val = 255.0;
image->SetPixel(pixelIndex, val);
}
}
}
itk::RegionalMaximaImageFilter
Produce a binary image where foreground is the regional maxima of the input image.
Definition: itkRegionalMaximaImageFilter.h:54
itk::GTest::TypedefsAndConstructors::Dimension2::SizeType
ImageBaseType::SizeType SizeType
Definition: itkGTestTypedefsAndConstructors.h:49
itkImage.h
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::Size::SetSize
void SetSize(const SizeValueType val[VDimension])
Definition: itkSize.h:179
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:86
itkRegionalMaximaImageFilter.h