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/*=========================================================================
*
* 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"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkGaussianBlurImageFunction.h"
#include "itkImageRegionIterator.h"
int main( int argc, char * argv[] )
{
if( argc < 5 ) {
std::cerr << "Usage: " << std::endl;
std::cerr << argv[0] << " inputImageFile outputImageFile sigma maxKernelWidth" << std::endl;
return EXIT_FAILURE;
}
typedef itk::Image< float, 2 > ImageType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageRegionIterator< ImageType > IteratorType;
typedef itk::ImageRegionConstIterator< ImageType > ConstIteratorType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( argv[1] );
reader->Update();
const ImageType * inputImage = reader->GetOutput();
ImageType::RegionType region = inputImage->GetBufferedRegion();
ConstIteratorType it( inputImage, region );
ImageType::Pointer output = ImageType::New();
output->SetRegions( region );
output->SetOrigin( inputImage->GetOrigin() );
output->SetSpacing( inputImage->GetSpacing() );
output->Allocate();
IteratorType out( output, region );
typedef itk::GaussianBlurImageFunction< ImageType > GFunctionType;
GFunctionType::Pointer gaussianFunction = GFunctionType::New();
gaussianFunction->SetInputImage( inputImage );
GFunctionType::ErrorArrayType setError;
setError.Fill( 0.01 );
gaussianFunction->SetMaximumError( setError );
gaussianFunction->SetSigma( atof( argv[3] ) );
gaussianFunction->SetMaximumKernelWidth( atoi( argv[4] ) );
it.GoToBegin();
out.GoToBegin();
while( !it.IsAtEnd() )
{
out.Set( gaussianFunction->EvaluateAtIndex(it.GetIndex() ) );
++it;
++out;
}
typedef itk::ImageFileWriter < ImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName(argv[2]);
writer->SetInput(output);
writer->Update();
return EXIT_SUCCESS;
}
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