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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 "itkPermuteAxesImageFilter.h"
#include "itkTextOutput.h"
#include "itkCommand.h"
// The following classe is used to support callbacks
// on the filter in the pipeline that follows later
class ShowProgressObject
{
public:
ShowProgressObject(itk::ProcessObject* o)
{m_Process = o;}
void ShowProgress()
{std::cout << "Progress " << m_Process->GetProgress() << std::endl;}
itk::ProcessObject::Pointer m_Process;
};
int itkPermuteAxesImageFilterTest(int, char* [] )
{
itk::OutputWindow::SetInstance( itk::TextOutput::New() );
typedef unsigned char PixelType;
enum { ImageDimension = 4 };
typedef itk::Image<PixelType,ImageDimension> ImageType;
typedef itk::PermuteAxesImageFilter<ImageType> PermuterType;
// define a small input test
ImageType::IndexType index = {{ 10, 20, 30, 40 }};
ImageType::SizeType size = {{5,4,3,2}};
ImageType::RegionType region;
region.SetSize( size );
region.SetIndex( index );
double spacing[ImageDimension] = { 1.1, 1.2, 1.3, 1.4 };
double origin[ImageDimension] = { 0.5, 0.4, 0.3, 0.2 };
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
PermuterType::Pointer permuter = PermuterType::New();
unsigned int order[ImageDimension] = { 2, 0, 3, 1 };
permuter->SetOrder( order );
permuter->SetInput( inputImage );
ShowProgressObject progressWatch(permuter);
itk::SimpleMemberCommand<ShowProgressObject>::Pointer command;
command = itk::SimpleMemberCommand<ShowProgressObject>::New();
command->SetCallbackFunction(&progressWatch,
&ShowProgressObject::ShowProgress);
permuter->AddObserver( itk::ProgressEvent(), command);
permuter->Update();
permuter->GetOutput()->Print( std::cout );
permuter->Print( std::cout );
// check the output
ImageType::Pointer outputImage = permuter->GetOutput();
inputIter.GoToBegin();
bool passed = true;
while ( !inputIter.IsAtEnd() )
{
ImageType::IndexType inputIndex = inputIter.GetIndex();
ImageType::IndexType outputIndex;
for ( int j = 0; j < ImageDimension; j++ )
{
outputIndex[j] = inputIndex[order[j]];
}
if ( inputIter.Get() != outputImage->GetPixel( outputIndex ) )
{
passed = false;
std::cout << "Mismatch at index: " << inputIndex << std::endl;
}
++inputIter;
}
if ( !passed )
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
// exercise Get methods
std::cout << "Order: " << permuter->GetOrder() << std::endl;
std::cout << "InverseOrder: " << permuter->GetInverseOrder() << std::endl;
// test SetOrder logic - repeating indices
passed = false;
order[0] = order[1];
try
{
permuter->SetOrder( order );
}
catch( itk::ExceptionObject & err )
{
passed = true;
std::cout << err << std::endl;
}
if ( !passed )
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
// test SetOrder logic - indices out of range
passed = false;
order[0] = ImageDimension + 2;
try
{
permuter->SetOrder( order );
}
catch( itk::ExceptionObject & err )
{
passed = true;
std::cout << err << std::endl;
}
if ( !passed )
{
std::cout << "Test failed." << std::endl;
return EXIT_FAILURE;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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