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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 "itkCastImageFilter.h"
#include "itkImageFileWriter.h"
#include "itkPointSet.h"
#include "itkBSplineScatteredDataPointSetToImageFilter.h"
#include "itkTestingMacros.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 < 3 )
{
std::cerr << "Missing arguments" << std::endl;
std::cerr << "Usage:" << std::endl;
std::cerr << argv[0] << "inputPointsFile.txt outputImage" << std::endl;
return EXIT_FAILURE;
}
const unsigned int ParametricDimension = 1;
const unsigned int DataDimension = 3;
typedef double RealType;
typedef unsigned char OutputPixelType;
typedef itk::Vector<RealType, DataDimension> VectorType;
typedef itk::Vector<OutputPixelType, DataDimension> OutputVectorType;
typedef itk::Image< VectorType, ParametricDimension> ImageType;
typedef itk::Image< OutputVectorType, ParametricDimension> OutputImageType;
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] );
// The actual data to be approximated
VectorType P;
// Parameter of the curve
PointSetType::PointType parameterPosition;
unsigned int pointCounter = 0;
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
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();
EXERCISE_BASIC_OBJECT_METHODS( filter, BSplineScatteredDataPointSetToImageFilter,
PointSetToImageFilter );
// Define the parametric domain
ImageType::SpacingType spacing;
spacing.Fill( 0.001 );
ImageType::SizeType size;
// Adding 0.5 to avoid rounding errors
size.Fill( static_cast<unsigned int>( 1.0/spacing[0] +.5 ) + 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 );
bool generateOutputImage = true;
filter->SetGenerateOutputImage( generateOutputImage );
TEST_SET_GET_VALUE( generateOutputImage, filter->GetGenerateOutputImage() );
filter->GenerateOutputImageOff();
TEST_SET_GET_VALUE( false, filter->GetGenerateOutputImage() );
filter->GenerateOutputImageOn();
TEST_SET_GET_VALUE( true, filter->GetGenerateOutputImage() );
TRY_EXPECT_NO_EXCEPTION( filter->Update() );
// Get the filter output
ImageType::Pointer outputImage = filter->GetOutput();
// Cast the output image
typedef itk::CastImageFilter< ImageType, OutputImageType > CastImageFilterType;
CastImageFilterType::Pointer caster = CastImageFilterType::New();
caster->SetInput( outputImage );
// Write the result image
typedef itk::ImageFileWriter< OutputImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName( argv[2] );
writer->SetInput( caster->GetOutput() );
TRY_EXPECT_NO_EXCEPTION( writer->Update() );
return EXIT_SUCCESS;
}
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