/usr/include/OTB-5.8/otbImageRegionSquareTileSplitter.txx is in libotb-dev 5.8.0+dfsg-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | /*=========================================================================
Program: ORFEO Toolbox
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Centre National d'Etudes Spatiales. All rights reserved.
See OTBCopyright.txt for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef otbImageRegionSquareTileSplitter_txx
#define otbImageRegionSquareTileSplitter_txx
#include "otbImageRegionSquareTileSplitter.h"
#include "otbMath.h"
#include "otbMacro.h"
namespace otb
{
template <unsigned int VImageDimension>
unsigned int
ImageRegionSquareTileSplitter<VImageDimension>
::GetNumberOfSplits(const RegionType& region, unsigned int requestedNumber)
{
unsigned int theoricalNbPixelPerTile = region.GetNumberOfPixels() / requestedNumber;
unsigned int theoricalTileDimension = static_cast<unsigned int> (vcl_sqrt(static_cast<double>(theoricalNbPixelPerTile)) );
// Take the next multiple of m_TileSizeAlignment (eventually generate more splits than requested)
m_TileDimension = (theoricalTileDimension + m_TileSizeAlignment - 1) / m_TileSizeAlignment * m_TileSizeAlignment;
// Minimal tile size is m_TileSizeAlignment * m_TileSizeAlignment
if (m_TileDimension < m_TileSizeAlignment)
{
otbMsgDevMacro(<< "Warning: clamping tile size to " << m_TileSizeAlignment << " * " << m_TileSizeAlignment);
m_TileDimension = m_TileSizeAlignment;
}
unsigned int numPieces = 1;
const SizeType& regionSize = region.GetSize();
for (unsigned int j = 0; j < VImageDimension; ++j)
{
m_SplitsPerDimension[j] = (regionSize[j] + m_TileDimension - 1) / m_TileDimension;
numPieces *= m_SplitsPerDimension[j];
}
otbMsgDevMacro(<< "Tile dimension : " << m_TileDimension)
otbMsgDevMacro(<< "Number of splits per dimension : " << m_SplitsPerDimension[0] << " " << m_SplitsPerDimension[1])
return numPieces;
}
template <unsigned int VImageDimension>
itk::ImageRegion<VImageDimension>
ImageRegionSquareTileSplitter<VImageDimension>
::GetSplit(unsigned int i, unsigned int itkNotUsed(numberOfPieces), const RegionType& region)
{
RegionType splitRegion;
IndexType splitIndex;
// Compute the actual number of splits
unsigned int numPieces = 1;
for (unsigned int j = 0; j < VImageDimension; ++j)
{
numPieces *= m_SplitsPerDimension[j];
}
// Sanity check
if (i >= numPieces)
{
itkExceptionMacro("Asked for split number " << i << " but region contains only " << numPieces << " splits");
}
// Compute the split index in the streaming grid
unsigned int remaining = i;
for (unsigned int j = VImageDimension - 1; j > 0; --j)
{
splitIndex[j] = remaining / m_SplitsPerDimension[VImageDimension - 1 - j];
remaining = remaining % m_SplitsPerDimension[VImageDimension - 1 - j];
}
splitIndex[0] = remaining;
// Transform the split index to the actual coordinates
for (unsigned int j = 0; j < VImageDimension; ++j)
{
splitRegion.SetIndex(j, region.GetIndex(j) + m_TileDimension * splitIndex[j]);
splitRegion.SetSize(j, m_TileDimension);
}
// Handle the borders
splitRegion.Crop(region);
return splitRegion;
}
/**
*
*/
template <unsigned int VImageDimension>
void
ImageRegionSquareTileSplitter<VImageDimension>
::PrintSelf(std::ostream& os, itk::Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "SplitsPerDimension : " << m_SplitsPerDimension << std::endl;
os << indent << "TileDimension : " << m_TileDimension << std::endl;
os << indent << "TileSizeAlignment : " << m_TileSizeAlignment << std::endl;
}
} // end namespace itk
#endif
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