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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 itkShiftScaleLabelMapFilter_hxx
#define itkShiftScaleLabelMapFilter_hxx
#include "itkProgressReporter.h"
namespace itk
{
template <typename TImage>
ShiftScaleLabelMapFilter<TImage>::ShiftScaleLabelMapFilter()
{
m_Shift = 0.0;
m_Scale = 1.0;
m_ChangeBackgroundValue = false;
}
template <typename TImage>
void
ShiftScaleLabelMapFilter<TImage>::GenerateData()
{
// Allocate the output
this->AllocateOutputs();
ImageType * output = this->GetOutput();
// get the label objects
typename ImageType::LabelObjectVectorType labelObjects = output->GetLabelObjects();
ProgressReporter progress(this, 0, static_cast<SizeValueType>(labelObjects.size()));
// change the background, if requested
if (m_ChangeBackgroundValue)
{
auto label = static_cast<PixelType>(m_Scale * output->GetBackgroundValue() + m_Shift);
output->SetBackgroundValue(label);
}
// and put back the objects in the map
output->ClearLabels();
auto it = labelObjects.begin();
while (it != labelObjects.end())
{
LabelObjectType * lo = *it;
auto label = static_cast<PixelType>(m_Scale * lo->GetLabel() + m_Shift);
lo->SetLabel(label);
output->AddLabelObject(lo);
// go to the next label
progress.CompletedPixel();
++it;
}
}
template <typename TImage>
void
ShiftScaleLabelMapFilter<TImage>::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Shift: " << m_Shift << std::endl;
os << indent << "Scale: " << m_Scale << std::endl;
os << indent << "ChangeBackgroundValue: " << m_ChangeBackgroundValue << std::endl;
}
} // end namespace itk
#endif
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