/usr/include/OTB-6.4/otbBinaryImageMinimalBoundingRegionCalculator.txx is in libotb-dev 6.4.0+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
*
* This file is part of Orfeo Toolbox
*
* https://www.orfeo-toolbox.org/
*
* 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
*
* 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 otbBinaryImageMinimalBoundingRegionCalculator_txx
#define otbBinaryImageMinimalBoundingRegionCalculator_txx
#include "otbBinaryImageMinimalBoundingRegionCalculator.h"
#include "itkImageSliceConstIteratorWithIndex.h"
#include "otbMacro.h"
namespace otb
{
/*
* Constructor
*/
template <class TInputImage>
BinaryImageMinimalBoundingRegionCalculator<TInputImage>
::BinaryImageMinimalBoundingRegionCalculator()
{
// The pad option is desactivated by default
m_Pad = 0;
// Set the default region
typename InputImageType::SizeType size;
typename InputImageType::IndexType index;
size[0] = 0;
size[1] = 0;
index[0] = 0;
index[1] = 0;
m_Region.SetSize(size);
m_Region.SetIndex(index);
m_InsideValue = static_cast<PixelType>(255);
}
/**
* Main computation method
*/
template <class TInputImage>
void
BinaryImageMinimalBoundingRegionCalculator<TInputImage>
::GenerateData(void)
{
// Input images pointers
const InputImageType* image = this->GetInput();
// Iterator definition
typedef itk::ImageSliceConstIteratorWithIndex<InputImageType> SliceIteratorType;
// Indexes containing upper-left and lower-right corner
typename InputImageType::IndexType min;
typename InputImageType::IndexType max;
min[0] = 0;
min[1] = 0;
max[1] = 0;
max[1] = 0;
for (unsigned int axis = 0; axis < InputImageType::ImageDimension; ++axis)
{ // Create the forward iterator to find lower bound
SliceIteratorType fit(image, image->GetLargestPossibleRegion());
fit.SetFirstDirection(!axis);
fit.SetSecondDirection(axis);
fit.GoToBegin();
// Walk through the two images line by line
while (!fit.IsAtEnd())
{
while (!fit.IsAtEndOfSlice())
{
while (!fit.IsAtEndOfLine())
{
// If a common intersection is found
if (fit.Get() == m_InsideValue)
{
// then the lower bound is found
min[axis] = fit.GetIndex()[axis];
fit.GoToReverseBegin(); // skip to the end
break;
}
++fit;
}
fit.NextLine();
}
fit.NextSlice();
}
// Create the reverse iterator to find upper bound
SliceIteratorType rit(image, image->GetLargestPossibleRegion());
rit.SetFirstDirection(!axis);
rit.SetSecondDirection(axis);
rit.GoToReverseBegin();
// Walk through the two images line by line
while (!rit.IsAtReverseEnd())
{
while (!rit.IsAtReverseEndOfSlice())
{
while (!rit.IsAtReverseEndOfLine())
{
// If a common intersection is found
if (rit.Get() == m_InsideValue)
{
max[axis] = rit.GetIndex()[axis];
rit.GoToBegin(); //Skip to reverse end
break;
}
--rit;
}
rit.PreviousLine();
}
rit.PreviousSlice();
}
}
typename InputImageType::SizeType size;
typename InputImageType::IndexType index;
for (unsigned int i = 0; i < InputImageType::ImageDimension; ++i)
{
size[i] = max[i] - min[i] + 1;
index[i] = min[i];
}
m_Region.SetIndex(index);
m_Region.SetSize(size);
if (m_Pad)
{
m_Region.PadByRadius(m_Pad);
}
m_Region.Crop(image->GetLargestPossibleRegion());
}
/**
* PrintSelf method
*/
template <class TInputImage>
void
BinaryImageMinimalBoundingRegionCalculator<TInputImage>
::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
}
} // End namespace otb
#endif
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