text: /*=========================================================================
  *
  *  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 <stdlib.h>
  #include <iostream>
  
  // create convenient namespace alias
  namespace sitk = itk::simple;
  
  
  int main ( int argc, char* argv[] ) {
  
    if ( argc < 4 ) {
      std::cerr << "Usage: " << argv[0] << " <input> <sigma> <output>\n";
      return 1;
    }
  
  
    sitk::Image image = sitk::ReadImage ( std::string ( argv[1] ) );
  
    sitk::PixelIDValueEnum inputPixelID = image.GetPixelID();
  
    image = sitk::SmoothingRecursiveGaussian ( image, atof ( argv[2] ) );
  
    image = sitk::Cast( image, inputPixelID );
  
    sitk::WriteImage ( image, std::string ( argv[3] ) );
  
    return 0;
  }
  