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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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.
*
*=========================================================================*/
#ifndef itkAttributeRelabelLabelMapFilter_hxx
#define itkAttributeRelabelLabelMapFilter_hxx
#include "itkProgressReporter.h"
namespace itk
{
template <typename TImage, typename TAttributeAccessor>
AttributeRelabelLabelMapFilter<TImage, TAttributeAccessor>::AttributeRelabelLabelMapFilter()
{
m_ReverseOrdering = false;
}
template <typename TImage, typename TAttributeAccessor>
void
AttributeRelabelLabelMapFilter<TImage, TAttributeAccessor>::GenerateData()
{
// Allocate the output
this->AllocateOutputs();
ImageType * output = this->GetOutput();
using VectorType = typename std::vector<typename LabelObjectType::Pointer>;
ProgressReporter progress(this, 0, 2 * output->GetNumberOfLabelObjects());
// get the label objects in a vector, so they can be sorted
VectorType labelObjects;
labelObjects.reserve(output->GetNumberOfLabelObjects());
for (typename ImageType::Iterator it(output); !it.IsAtEnd(); ++it)
{
labelObjects.push_back(it.GetLabelObject());
progress.CompletedPixel();
}
// instantiate the comparator and sort the vector
if (m_ReverseOrdering)
{
ReverseComparator comparator;
std::sort(labelObjects.begin(), labelObjects.end(), comparator);
}
else
{
Comparator comparator;
std::sort(labelObjects.begin(), labelObjects.end(), comparator);
}
// progress.CompletedPixel();
// and put back the objects in the map
output->ClearLabels();
unsigned int label = 0;
for (typename VectorType::const_iterator it = labelObjects.begin(); it != labelObjects.end(); ++it)
{
// avoid the background label if it is used
if (label == output->GetBackgroundValue())
{
++label;
}
(*it)->SetLabel(label);
output->AddLabelObject(*it);
// go to the nex label
++label;
progress.CompletedPixel();
}
}
template <typename TImage, typename TAttributeAccessor>
void
AttributeRelabelLabelMapFilter<TImage, TAttributeAccessor>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "ReverseOrdering: " << m_ReverseOrdering << std::endl;
}
} // end namespace itk
#endif
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