ITK  5.2.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageFeature/ExtractContoursFromImage/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 "itkImageFileWriter.h"
#include "itkSimpleContourExtractorImageFilter.h"
#include "itkImageRegionIterator.h"
using UnsignedCharImageType = itk::Image<unsigned char, 2>;
static void CreateImage(UnsignedCharImageType::Pointer image);
int main(int, char *[])
{
UnsignedCharImageType::Pointer image = UnsignedCharImageType::New();
CreateImage(image);
using SimpleContourExtractorImageFilterType = itk::SimpleContourExtractorImageFilter <UnsignedCharImageType, UnsignedCharImageType>;
SimpleContourExtractorImageFilterType::Pointer contourFilter
= SimpleContourExtractorImageFilterType::New();
contourFilter->SetInput(image);
contourFilter->Update();
using WriterType = itk::ImageFileWriter< UnsignedCharImageType >;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("output.png");
writer->SetInput(contourFilter->GetOutput());
writer->Update();
return EXIT_SUCCESS;
}
void CreateImage(UnsignedCharImageType::Pointer image)
{
// Create an 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();
image->FillBuffer(0);
// Create a line pixels
for(unsigned int i = 40; i < 60; ++i)
{
itk::Index<2> pixel;
pixel.Fill(i);
image->SetPixel(pixel, 255);
}
// Create another line of pixels
for(unsigned int i = 10; i < 20; ++i)
{
itk::Index<2> pixel;
pixel[0] = 10;
pixel[1] = i;
image->SetPixel(pixel, 255);
}
using WriterType = itk::ImageFileWriter< UnsignedCharImageType >;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName("input.png");
writer->SetInput(image);
writer->Update();
}