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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.
*
*=========================================================================*/
// This one header will include all SimpleITK filters and external
// objects.
#include <SimpleITK.h>
#include <iostream>
#include <stdlib.h>
#include <iomanip>
// create convenient namespace alias
namespace sitk = itk::simple;
// Create A Command Callback to be registered with the ProcessObject
// on the ProgressEvent
//
// Internally we maintain a reference to the ProcessObject passed
// during construction. Therefore, it would be an error to execute the
// Execute method after the ProcessObject is delete. But this class
// can be created on the stack, with out issue.
class ProgressUpdate
: public sitk::Command
{
public:
ProgressUpdate(const sitk::ProcessObject &po)
: m_Process(po)
{}
virtual void Execute( )
{
// stash the stream state
std::ios state(NULL);
state.copyfmt(std::cout);
std::cout << std::fixed << std::setw( 3 ) << std::setprecision( 2 );
// Print the Progress "Active Measurement"
std::cout << m_Process.GetName()<< " Progress: " << m_Process.GetProgress() << std::endl;
std::cout.copyfmt(state);
}
private:
const sitk::ProcessObject &m_Process;
};
int main ( int argc, char* argv[] ) {
if ( argc < 4 ) {
std::cerr << "Usage: " << argv[0] << " <input> <variance> <output>\n";
return 1;
}
// Read the image file
sitk::ImageFileReader reader;
reader.SetFileName ( std::string ( argv[1] ) );
sitk::Image image = reader.Execute();
// This filters perform a gaussian bluring with sigma in physical
// space. The output image will be of real type.
sitk::DiscreteGaussianImageFilter gaussian;
gaussian.SetVariance ( atof ( argv[2] ) );
// Construct our custom command on the stack
ProgressUpdate cmd(gaussian);
// register it with the filter for the ProgressEvent
gaussian.AddCommand( sitk::sitkProgressEvent, cmd );
sitk::Image blurredImage = gaussian.Execute ( image );
// Covert the real output image back to the original pixel type, to
// make writing easier, as many file formats don't support real
// pixels.
sitk::CastImageFilter caster;
caster.SetOutputPixelType( image.GetPixelID() );
sitk::Image outputImage = caster.Execute( blurredImage );
// write the image
sitk::ImageFileWriter writer;
writer.SetFileName ( std::string ( argv[3] ) );
writer.Execute ( outputImage );
return 0;
}
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