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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 "itkLevelSetImage.h"
#include "itkLevelSetDenseImage.h"
#include "itkImage.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkVTKVisualize2DLevelSetAsElevationMap.h"
#include "vtkPolyData.h"
#include "vtkMassProperties.h"
#include "vtkSmartPointer.h"
template< typename TImage >
void GenerateImage( typename TImage::Pointer ioImage )
{
typename TImage::IndexType index;
index.Fill( 0 );
typename TImage::SizeType size;
size[0]=50;
size[1]=49;
typename TImage::RegionType region;
region.SetIndex( index );
region.SetSize( size );
typedef typename TImage::PixelType PixelType;
ioImage->SetRegions( region );
ioImage->Allocate();
ioImage->FillBuffer( itk::NumericTraits< PixelType >::ZeroValue() );
index.Fill( 10 );
region.SetIndex( index );
size.Fill( 30 );
region.SetSize( size );
typename itk::ImageRegionIterator< TImage > it( ioImage, region );
it.GoToBegin();
while( !it.IsAtEnd() )
{
it.Set( itk::NumericTraits< PixelType >::max() );
++it;
}
}
int itkVTKVisualize2DLevelSetAsElevationMapTest( int , char* [] )
{
typedef unsigned char PixelType;
const unsigned int Dimension = 2;
typedef itk::Image< PixelType, Dimension > ImageType;
ImageType::Pointer image = ImageType::New();
GenerateImage< ImageType >( image );
typedef double LevelSetOutputType;
typedef itk::Image< LevelSetOutputType, Dimension > LevelSetImageType;
typedef itk::LevelSetDenseImage< LevelSetImageType > LevelSetType;
LevelSetImageType::Pointer LevelSetImage = LevelSetImageType::New();
GenerateImage< LevelSetImageType >( LevelSetImage );
typedef itk::ImageRegionIteratorWithIndex< LevelSetImageType > IteratorType;
IteratorType it( LevelSetImage, LevelSetImage->GetLargestPossibleRegion() );
it.GoToBegin();
while( !it.IsAtEnd() )
{
LevelSetImageType::IndexType idx = it.GetIndex();
LevelSetOutputType value =
static_cast< LevelSetOutputType >( ( idx[0] - 25 ) * ( idx[0] - 25 ) +
( idx[1] - 25 ) * ( idx[1] - 25 ) );
value = std::sqrt( value ) - 20;
it.Set( value );
++it;
}
LevelSetType::Pointer levelset = LevelSetType::New();
levelset->SetImage( LevelSetImage );
typedef itk::VTKVisualize2DLevelSetAsElevationMap< ImageType, LevelSetType > VisualizationType;
VisualizationType::Pointer viewer = VisualizationType::New();
viewer->SetInputImage( image );
viewer->SetLevelSet( levelset );
viewer->SetScreenCapture( true );
viewer->SetHeightScaling( 0.1 );
viewer->Update();
vtkPolyData* levelsetSurface = viewer->GetElevationMapMesh();
vtkCellArray* cells = levelsetSurface->GetPolys();
vtkSmartPointer<vtkMassProperties> massProperty = vtkSmartPointer<vtkMassProperties>::New();
#if VTK_MAJOR_VERSION <= 5
massProperty->SetInput( levelsetSurface );
#else
massProperty->SetInputData( levelsetSurface );
#endif
double averageSurfaceAreaPerCell = massProperty->GetSurfaceArea()/cells->GetNumberOfCells();
if ( averageSurfaceAreaPerCell > 2.5 )
{
std::cerr << "Average surface area per cell too high." << std::endl;
return EXIT_FAILURE;
}
if ( viewer->GetHeightScaling() != 0.1)
{
std::cerr << "HeightScaling not set correctly." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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