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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 "itkPointSet.h"
#include "itkBSplineScatteredDataPointSetToImageFilter.h"
#include <fstream>
/**
* In this test, we approximate a sequence of 3D points with a parametric
* curve described by B-Splines
*/
int itkBSplineScatteredDataPointSetToImageFilterTest3( int argc, char * argv [] )
{
if( argc < 2 )
{
std::cerr << "Missing arguments" << std::endl;
std::cerr << "Usage:" << std::endl;
std::cerr << argv[0] << "inputPointsFile.txt" << std::endl;
return EXIT_FAILURE;
}
const unsigned int ParametricDimension = 1;
const unsigned int DataDimension = 3;
typedef double RealType;
typedef itk::Vector<RealType, DataDimension> VectorType;
typedef itk::Image<VectorType, ParametricDimension> ImageType;
typedef VectorType PointSetPixelType;
typedef itk::PointSet< PointSetPixelType, ParametricDimension > PointSetType;
PointSetType::Pointer pointSet = PointSetType::New();
// Read the input points
std::ifstream inputFile;
inputFile.open( argv[1] );
VectorType P; // The actual data to be approximated
PointSetType::PointType parameterPosition; // parameter of the curve
unsigned int pointCounter = 0;
std::cout << "Input Data" << std::endl;
inputFile >> P;
// FIXME: add parameterization of the input points, in the range [0:1]
double t =0.0;
while( ! inputFile.eof() )
{
parameterPosition[0] = t;
t += 0.01; // FIXME
std::cout << P << std::endl;
pointSet->SetPoint( pointCounter, parameterPosition );
pointSet->SetPointData( pointCounter, P );
pointCounter++;
inputFile >> P;
}
inputFile.close();
// Instantiate the filter and set the parameters
typedef itk::BSplineScatteredDataPointSetToImageFilter
<PointSetType, ImageType> FilterType;
FilterType::Pointer filter = FilterType::New();
// Define the parametric domain
ImageType::SpacingType spacing;
spacing.Fill( 0.001 );
ImageType::SizeType size;
size.Fill( static_cast<unsigned int>( 1.0/spacing[0] ) + 1 );
ImageType::PointType origin;
origin.Fill( 0.0 );
filter->SetSize( size );
filter->SetOrigin( origin );
filter->SetSpacing( spacing );
filter->SetInput( pointSet );
filter->SetSplineOrder( 3 );
FilterType::ArrayType ncps;
ncps.Fill( 4 );
filter->SetNumberOfControlPoints( ncps );
// We set an extreme number of levels to show how this
// fails because of the choice of B-spline epsilon
filter->SetNumberOfLevels( 15 );
filter->SetGenerateOutputImage( true );
try
{
filter->Update();
}
catch ( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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