ITK  4.13.0
Insight Segmentation and Registration Toolkit
SphinxExamples/src/Core/Common/ApplyAFilterOnlyToASpecifiedRegionOfAnImage/Code.cxx
/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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 *[])
{
const unsigned int Dimension = 2;
typedef float PixelType;
smallSize.Fill(10);
index.Fill(0);
ImageType::RegionType region(index, smallSize);
bigSize.Fill(10000);
typedef itk::RandomImageSource<ImageType> RandomSourceType;
RandomSourceType::Pointer randomImageSource = RandomSourceType::New();
randomImageSource->SetNumberOfThreads(1); // to produce non-random results
randomImageSource->SetSize(bigSize);
randomImageSource->GetOutput()->SetRequestedRegion(smallSize);
std::cout << "Created random image." << std::endl;
DerivativeImageFilterType;
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;
}