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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 <iostream>
#include "itkImageRegionIterator.h"
#include "itkShrinkImageFilter.h"
#include "itkImportImageFilter.h"
#include "itkTestingMacros.h"
int itkImportImageTest( int, char* [] )
{
// Create a C-array to hold an image
short *rawImage = new short[8*12];
for (unsigned int i = 0; i < 8*12; ++i)
{
rawImage[i] = i;
}
// typdefs to simplify the syntax
const unsigned int Dimension = 2;
typedef short PixelType;
typedef itk::ImportImageFilter< PixelType, Dimension > ImportImageFilter;
typedef itk::Image< PixelType, Dimension > ShortImage;
// Create an ImportImageFilter filter
ImportImageFilter::Pointer basicImport = ImportImageFilter::New();
EXERCISE_BASIC_OBJECT_METHODS( basicImport, ImportImageFilter, ImageSource );
ShortImage::Pointer image;
itk::ImageRegion< Dimension > region;
itk::ImageRegion< Dimension >::IndexType index = {{0, 0}};
itk::ImageRegion< Dimension >::SizeType size = {{8, 12}};
region.SetIndex( index );
region.SetSize( size );
//local scope to make sure that imported data is not deleted with ImportImageFilter
// but with the ImportImageContainer is creates.
{
// Create an ImportImageFilter filter
ImportImageFilter::Pointer import;
import = ImportImageFilter::New();
// Test the SetVectorMacros and GetVectorMacros
const itk::SpacePrecisionType data[2] = { 1.0, 1.0 };
import->SetSpacing(data);
const float data2[2] = { 1.0, 1.0 };
import->SetSpacing(data2);
const itk::SpacePrecisionType * spacingValue = import->GetSpacing().GetDataPointer();
std::cout << "import->GetSpacing(): " << spacingValue << std::endl;
const double data3[2] = { 1.0, 1.0 };
import->SetOrigin(data3);
const float data4[2] = { 1.0, 1.0 };
import->SetOrigin(data4);
const itk::SpacePrecisionType * originValue = import->GetOrigin().GetDataPointer();
std::cout << "import->GetOrigin(): " << originValue << std::endl;
import->SetRegion( region );
import->SetImportPointer( rawImage, 8 * 12, true );
import->Update();
image = import->GetOutput();
}
// Create another filter
itk::ShrinkImageFilter< ImportImageFilter::OutputImageType, ShortImage >::Pointer shrink =
itk::ShrinkImageFilter< ImportImageFilter::OutputImageType, ShortImage >::New();
shrink->SetInput( image );
shrink->SetShrinkFactors(2); // Also tested with factors 3 and 4, with 12x12 image
try
{
shrink->Update();
}
catch (itk::ExceptionObject& e)
{
std::cerr << "Exception detected: " << e.GetDescription();
return EXIT_FAILURE;
}
//
// The rest of this code determines whether the shrink code produced
// the image we expected.
//
ShortImage::RegionType requestedRegion;
requestedRegion = shrink->GetOutput()->GetRequestedRegion();
itk::ImageRegionIterator<ShortImage>
iterator2(shrink->GetOutput(), requestedRegion);
bool passed = true;
for (; !iterator2.IsAtEnd(); ++iterator2)
{
std::cout << "Pixel " << iterator2.GetIndex() << " = " << iterator2.Get() << std::endl;
if (iterator2.Get() != itk::Math::RoundHalfIntegerUp<short>(
static_cast<float>( (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] +
shrink->GetShrinkFactors()[0]/2) +
(region.GetSize()[0] * ((shrink->GetShrinkFactors()[1]/2) +
(shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[1]))))))
{
std::cout << " iterator2.GetIndex() Get() " << iterator2.GetIndex() << " " << iterator2.Get()
<< " compare value " << itk::Math::RoundHalfIntegerUp<short>(
static_cast<float>( (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] +
shrink->GetShrinkFactors()[0]/2) +
(region.GetSize()[0] * ((shrink->GetShrinkFactors()[1]/2) +
(shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[1]))))) << "\n";
passed = false;
}
}
if (passed)
{
std::cout << "ImportImageFilter test passed." << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "ImportImageFilter test failed." << std::endl;
return EXIT_FAILURE;
}
}
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