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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 "itkFlipImageFilter.h"
#include "itkTextOutput.h"
#include "itkFilterWatcher.h"
#include "itkImageRegionIteratorWithIndex.h"
int itkFlipImageFilterTest(int, char* [] )
{
itk::OutputWindow::SetInstance(itk::TextOutput::New());
typedef unsigned char PixelType;
enum { ImageDimension = 3 };
typedef itk::Image<PixelType,ImageDimension> ImageType;
typedef itk::FlipImageFilter<ImageType> FlipperType;
// define a small input test
ImageType::IndexType index = {{ 10, 20, 30 }};
ImageType::SizeType size = {{5,4,3}};
ImageType::RegionType region;
region.SetSize( size );
region.SetIndex( index );
ImageType::SpacingType spacing;
spacing[0] = 1.1;
spacing[1] = 1.2;
spacing[2] = 1.3;
ImageType::PointType origin;
origin[0] = 0.5;
origin[1] = 0.4;
origin[2] = 0.3;
ImageType::Pointer inputImage = ImageType::New();
inputImage->SetLargestPossibleRegion( region );
inputImage->SetBufferedRegion( region );
inputImage->Allocate();
inputImage->SetSpacing( spacing );
inputImage->SetOrigin( origin );
typedef itk::ImageRegionIteratorWithIndex<ImageType> Iterator;
Iterator inputIter( inputImage, inputImage->GetBufferedRegion() );
PixelType counter = 0;
while ( !inputIter.IsAtEnd() )
{
inputIter.Set( counter );
++counter;
++inputIter;
}
// permute the image
FlipperType::Pointer flipper = FlipperType::New();
FilterWatcher watcher(flipper);
bool bArray[ImageDimension] = { true, false, true };
FlipperType::FlipAxesArrayType flipAxes( bArray );
flipper->SetFlipAxes( flipAxes );
std::cout << "FlipAxes: " << flipper->GetFlipAxes() << std::endl;
flipper->SetInput( inputImage );
flipper->Update();
flipper->GetOutput()->Print( std::cout );
flipper->Print( std::cout );
// check the output
ImageType::Pointer outputImage = flipper->GetOutput();
const ImageType::SpacingType& inputSpacing = inputImage->GetSpacing();
const ImageType::PointType& inputOrigin = inputImage->GetOrigin();
const ImageType::SpacingType& outputSpacing = outputImage->GetSpacing();
const ImageType::PointType& outputOrigin = outputImage->GetOrigin();
inputImage->Print( std::cout );
outputImage->Print( std::cout );
typedef ImageType::IndexType IndexType;
typedef IndexType::IndexValueType IndexValueType;
inputIter.GoToBegin();
bool passed = true;
while ( !inputIter.IsAtEnd() )
{
IndexType inputIndex = inputIter.GetIndex();
IndexType outputIndex;
for ( int j = 0; j < ImageDimension; j++ )
{
if ( flipAxes[j] )
{
double temp = - 1 * ( static_cast<double>( inputIndex[j] ) *
inputSpacing[j] + inputOrigin[j]);
outputIndex[j] = itk::Math::Round<IndexValueType>(( temp - outputOrigin[j] ) /
outputSpacing[j] );
}
else
{
outputIndex[j] = inputIndex[j];
}
}
if ( inputIter.Get() != outputImage->GetPixel( outputIndex ) )
{
passed = false;
std::cout << "Mismatch at index: " << inputIndex;
std::cout << " " << outputIndex << std::endl;
}
++inputIter;
}
if ( !passed )
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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