ITK  5.3.0
Insight Toolkit
SphinxExamples/src/Filtering/ImageFeature/ApplyAFilterOnlyToASpecifiedImageRegion/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"
int
main(int, char *[])
{
using ImageType = itk::Image<float, 2>;
itk::Size<2> smallSize;
smallSize.Fill(10);
index.Fill(0);
itk::ImageRegion<2> region(index, smallSize);
itk::Size<2> bigSize;
bigSize.Fill(10000);
randomImageSource->SetNumberOfWorkUnits(1); // to produce non-random results
randomImageSource->SetSize(bigSize);
randomImageSource->GetOutput()->SetRequestedRegion(smallSize);
randomImageSource->Update();
std::cout << "Created random image." << std::endl;
using DerivativeImageFilterType = itk::DerivativeImageFilter<ImageType, ImageType>;
DerivativeImageFilterType::Pointer derivativeFilter = DerivativeImageFilterType::New();
derivativeFilter->SetInput(randomImageSource->GetOutput());
derivativeFilter->SetDirection(0); // "x" axis
derivativeFilter->GetOutput()->SetRequestedRegion(smallSize);
derivativeFilter->Update();
std::cout << "Computed derivative." << std::endl;
return EXIT_SUCCESS;
}
itk::Index
Represent a n-dimensional index in a n-dimensional image.
Definition: itkIndex.h:67
itk::Size< 2 >
itk::ImageRegion
An image region represents a structured region of data.
Definition: itkImageRegion.h:69
itkImage.h
itk::SmartPointer< Self >
itk::Index::Fill
void Fill(IndexValueType value)
Definition: itkIndex.h:271
itk::Size::Fill
void Fill(SizeValueType value)
Definition: itkSize.h:211
itk::DerivativeImageFilter
Computes the directional derivative of an image. The directional derivative at each pixel location is...
Definition: itkDerivativeImageFilter.h:50
itkRandomImageSource.h
itk::Image
Templated n-dimensional image class.
Definition: itkImage.h:88
itk::RandomImageSource::New
static Pointer New()
itkDerivativeImageFilter.h