ENH: add a ImageRegionSquareTileSplitter

Code/Common/otbImageRegionSquareTileSplitter.h

+/*=========================================================================
+
+  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_h
+#define __otbImageRegionSquareTileSplitter_h
+
+#include "itkObject.h"
+#include "itkRegion.h"
+#include "itkImageRegion.h"
+#include "itkImageRegionSplitter.h"
+#include "itkObjectFactory.h"
+#include "itkIndex.h"
+#include "itkSize.h"
+
+namespace otb
+{
+
+/** \class ImageRegionSquareTileSplitter
+   * \brief Divide a region into several pieces.
+   *
+   * ImageRegionSquareTileSplitter divides an ImageRegion into smaller regions.
+   * ImageRegionSquareTileSplitter is used by the StreamingImageFilter to divide a
+   * requested output region into a series of smaller requests of the
+   * pipeline.  This object has two basic methods: GetNumberOfSplits()
+   * and GetSplit().
+   *
+   * GetNumberOfSplits() is used to determine how may subregions a given
+   * region can be divided.  You call GetNumberOfSplits with an argument
+   * that is the number of subregions you want.  If the image region can
+   * support that number of subregions, that number is returned.
+   * Otherwise, the maximum number of splits a region can support will
+   * be returned.  For example, if a region splitter class only divides
+   * a region into horizontal slabs, then the maximum number of splits
+   * will be the number of rows in the region.
+   *
+   * GetSplit() returns the ith of N subregions (as an ImageRegion object).
+   *
+   * This ImageRegionSquareTileSplitter class divides a region along the outermost
+   * dimension. If the outermost dimension has size 1 (i.e. a volume
+   * with a single slice), the ImageRegionSquareTileSplitter will divide the
+   * region along the next outermost dimension. If that dimension has size 1,
+   * the process continues with the next outermost dimension.
+   *
+   * Regions obtained by the ImageRegionSquareTileSplitter are aligned on a grid
+   * with width of 256. Divisions can occur only at line defined as k*256.
+   *
+   * Other ImageRegionSquareTileSplitter subclasses could divide an image into
+   * more uniform shaped regions instead of slabs.
+   *
+   * \sa ImageRegionMultidimensionalSplitter
+   *
+   * \ingroup ITKSystemObjects
+   * \ingroup DataProcessing
+ */
+
+template <unsigned int VImageDimension>
+class ITK_EXPORT ImageRegionSquareTileSplitter : public itk::ImageRegionSplitter<VImageDimension>
+{
+public:
+  /** Standard class typedefs. */
+  typedef ImageRegionSquareTileSplitter                Self;
+  typedef itk::ImageRegionSplitter<VImageDimension> Superclass;
+  typedef itk::SmartPointer<Self>                   Pointer;
+  typedef itk::SmartPointer<const Self>             ConstPointer;
+
+  /** Method for creation through the object factory. */
+  itkNewMacro(Self);
+
+  /** Run-time type information (and related methods). */
+  itkTypeMacro(ImageRegionSquareTileSplitter, itk::Object);
+
+  /** Dimension of the image available at compile time. */
+  itkStaticConstMacro(ImageDimension, unsigned int, VImageDimension);
+
+  /** Dimension of the image available at run time. */
+  static unsigned int GetImageDimension()
+  {
+    return VImageDimension;
+  }
+
+  /** Index typedef support. An index is used to access pixel values. */
+  typedef itk::Index<VImageDimension>        IndexType;
+  typedef typename IndexType::IndexValueType IndexValueType;
+
+  /** Size typedef support. A size is used to define region bounds. */
+  typedef itk::Size<VImageDimension>       SizeType;
+  typedef typename SizeType::SizeValueType SizeValueType;
+
+  /** Region typedef support.   */
+  typedef itk::ImageRegion<VImageDimension> RegionType;
+
+  itkSetMacro(PixelSizeInBytes, unsigned int);
+  itkGetMacro(PixelSizeInBytes, unsigned int);
+
+  itkSetMacro(TileSizeInBytes, unsigned int);
+  itkGetMacro(TileSizeInBytes, unsigned int);
+
+  /** How many pieces can the specifed region be split? A given region
+       * cannot always be divided into the requested number of pieces.  For
+       * instance, if the numberOfPieces exceeds the number of pixels along
+       * a certain dimensions, then some splits will not be possible. This
+       * method returns a number less than or equal to the requested number
+   * of pieces. */
+  virtual unsigned int GetNumberOfSplits(const RegionType& region,
+                                         unsigned int requestedNumber);
+
+  /** Get a region definition that represents the ith piece a specified region.
+       * The "numberOfPieces" specified should be less than or equal to what
+   * GetNumberOfSplits() returns. */
+  virtual RegionType GetSplit(unsigned int i, unsigned int numberOfPieces,
+                              const RegionType& region);
+
+protected:
+  ImageRegionSquareTileSplitter() : m_AlignStep(0), m_PixelSizeInBytes(0), m_TileSizeInBytes(0){}
+  virtual ~ImageRegionSquareTileSplitter() {}
+  void PrintSelf(std::ostream& os, itk::Indent indent) const;
+
+private:
+  ImageRegionSquareTileSplitter(const ImageRegionSquareTileSplitter &); //purposely not implemented
+  void operator =(const ImageRegionSquareTileSplitter&); //purposely not implemented
+
+  unsigned int m_SplitsPerDimension[VImageDimension];
+  unsigned int m_AlignStep;
+  unsigned int m_PixelSizeInBytes;
+  unsigned int m_TileSizeInBytes;
+};
+
+} // end namespace otb
+
+#ifndef OTB_MANUAL_INSTANTIATION
+# include "otbImageRegionSquareTileSplitter.txx"
+#endif
+
+#endif

Code/Common/otbImageRegionSquareTileSplitter.txx

+/*=========================================================================
+
+  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)
+{
+  if (m_TileSizeInBytes == 0)
+    {
+    itkExceptionMacro(<< "SetTileSizeInBytes has not been called");
+    }
+
+  if (m_PixelSizeInBytes == 0)
+    {
+    itkExceptionMacro(<< "SetPixelSizeInBytes has not been called");
+    }
+
+  // Compute the theorical square tile dimensions
+  const unsigned int nbPixelPerTile = m_TileSizeInBytes / m_PixelSizeInBytes;
+  unsigned int nbPixelPerDim  = static_cast<unsigned int>( vcl_sqrt(nbPixelPerTile));
+
+  // Use a reference tile size corresponding to a 256 * 256 region of a 4 bands unsigned short image (=512 k)
+  const unsigned int ReferenceTileSizeInBytes = 256 * 256 * 4 * 2;
+  unsigned int nbPixelPerReferenceTile = ReferenceTileSizeInBytes / m_PixelSizeInBytes;
+  unsigned int referenceNbPixelPerDim = static_cast<unsigned int>( vcl_sqrt(static_cast<float>(nbPixelPerReferenceTile)) );
+  // Align the tile dimension to the next multiple of 16 using integer division (TIFF tiles are aligned with 16)
+  referenceNbPixelPerDim = ( referenceNbPixelPerDim + 15 ) / 16 * 16;
+
+  // Align nbPixelPerDim with the next multiple of referenceNbPixelPerDim using integer division
+  m_AlignStep = (nbPixelPerDim + referenceNbPixelPerDim) / referenceNbPixelPerDim * referenceNbPixelPerDim;
+
+  // Use at least 16*16 tiles
+  if (m_AlignStep < 16)
+    {
+    m_AlignStep = 16;
+    }
+
+  const SizeType&  regionSize = region.GetSize();
+  const IndexType& regionIndex = region.GetIndex();
+
+  // requested number of splits per dimension
+  unsigned int numPieces = 1;
+
+  // determine the actual number of pieces that will be generated
+  for (unsigned int j = VImageDimension; j > 0; --j)
+    {
+//    otbMsgDevMacro(<< "*** Dimension: " << j-1);
+    unsigned long int remainingToDo =
+      static_cast<unsigned long int>(vcl_ceil(static_cast<double>(requestedNumber) / numPieces));
+    unsigned int maxPieces = (regionIndex[j - 1] + regionSize[j - 1] - 1) / m_AlignStep - regionIndex[j - 1]
+                             / m_AlignStep + 1;
+    unsigned int stepPerPiece = 1;
+    if (remainingToDo < maxPieces)
+      {
+      stepPerPiece = static_cast<unsigned int> (vcl_floor(static_cast<double> (maxPieces) / remainingToDo));
+      if ((remainingToDo - 1) * (stepPerPiece + 1) < maxPieces)
+        {
+        stepPerPiece += 1;
+        }
+      }
+    unsigned int maxPieceUsed = static_cast<unsigned int> (vcl_ceil(static_cast<double> (maxPieces) / stepPerPiece));
+    m_SplitsPerDimension[j - 1] = maxPieceUsed;
+//    otbMsgDevMacro("*** maxPieces stepPerPiece maxPieceUsed " << maxPieces
+//                      << " " << stepPerPiece << " " << maxPieceUsed);
+    numPieces *= maxPieceUsed;
+    }
+//  otbMsgDevMacro("*** numPieces " << numPieces);
+  return numPieces;
+}
+
+/**
+   *
+ */
+template <unsigned int VImageDimension>
+itk::ImageRegion<VImageDimension>
+ImageRegionSquareTileSplitter<VImageDimension>
+::GetSplit(unsigned int i, unsigned int numberOfPieces, const RegionType& region)
+{
+  RegionType splitRegion;
+  IndexType  splitIndex, regionIndex;
+  SizeType   splitSize, regionSize;
+
+  // Initialize the splitRegion to the requested region
+  splitRegion = region;
+  splitIndex = splitRegion.GetIndex();
+  splitSize = splitRegion.GetSize();
+
+  regionSize = region.GetSize();
+  regionIndex = region.GetIndex();
+
+  unsigned int numPieces = GetNumberOfSplits(region, numberOfPieces);
+  if (i > numPieces)
+    {
+    itkDebugMacro("  Cannot Split");
+    return splitRegion;
+    }
+
+  unsigned int stackSize = 1;
+  for (unsigned int j = 0; j < VImageDimension; ++j)
+    {
+    unsigned int slicePos = (i % (stackSize * m_SplitsPerDimension[j])) / stackSize;
+    stackSize *= m_SplitsPerDimension[j];
+
+    unsigned int generalSplitSize =
+      static_cast<unsigned int> (vcl_ceil(static_cast<double> (regionSize[j]) / (m_SplitsPerDimension[j]
+                                                                                 *
+                                                                                 m_AlignStep))) * m_AlignStep;
+    if (slicePos == 0)
+      {
+      splitIndex[j] = regionIndex[j];
+      }
+    else
+      {
+      splitIndex[j] = (regionIndex[j] / generalSplitSize + slicePos) * generalSplitSize;
+      }
+    if (slicePos == 0)
+      {
+      splitSize[j] = generalSplitSize - (regionIndex[j] % generalSplitSize);
+      }
+    else if (slicePos == m_SplitsPerDimension[j] - 1)
+      {
+      splitSize[j] = regionSize[j] - (generalSplitSize - (regionIndex[j] % generalSplitSize))
+                     - (m_SplitsPerDimension[j] - 2) * generalSplitSize;
+      }
+    else
+      {
+      splitSize[j] = generalSplitSize;
+      }
+    }
+
+  // set the split region ivars
+  splitRegion.SetIndex(splitIndex);
+  splitRegion.SetSize(splitSize);
+
+  return splitRegion;
+}
+
+/**
+ *
+ */
+template <unsigned int VImageDimension>
+void
+ImageRegionSquareTileSplitter<VImageDimension>
+::PrintSelf(std::ostream& os, itk::Indent indent) const
+{
+  Superclass::PrintSelf(os, indent);
+  os << indent << "AlignStep        : " << m_AlignStep << std::endl;
+  os << indent << "PixelSizeInBytes : " << m_PixelSizeInBytes << std::endl;
+  os << indent << "TileSizeInBytes  : " << m_TileSizeInBytes << std::endl;
+}
+
+} // end namespace itk
+
+#endif

Code/Common/otbStreamingTraits.txx

@@ -28,6 +28,8 @@
 #include "itkLinearInterpolateImageFunction.h"
 #include "itkNearestNeighborInterpolateImageFunction.h"
 
+#include "otbImageRegionSquareTileSplitter.h"
+
 namespace otb
 {
 
@@ -53,32 +55,30 @@ unsigned long StreamingTraitsBase<TImage>
       break;
     case SET_BUFFER_MEMORY_SIZE:
       {
-      const unsigned long bufferMemorySizeOctet = bufferMemorySize / 8;
       unsigned long       numberColumnsOfRegion = region.GetSize()[0]; // X dimension
-      const unsigned long sizeLine = numberColumnsOfRegion * \
+      const unsigned long sizeLineInBytes = numberColumnsOfRegion * \
                                      image->GetNumberOfComponentsPerPixel() * \
                                      sizeof(PixelType);
-      unsigned long regionSize = region.GetSize()[1] * sizeLine;
+      unsigned long regionSizeInBytes = region.GetSize()[1] * sizeLineInBytes;
       otbMsgDevMacro(<< "image->GetNumberOfComponentsPerPixel()   = " << image->GetNumberOfComponentsPerPixel());
       otbMsgDevMacro(<< "sizeof(PixelType)                        = " << sizeof(PixelType));
       otbMsgDevMacro(<< "numberColumnsOfRegion                    = " << numberColumnsOfRegion);
-      otbMsgDevMacro(<< "sizeLine                                 = " << sizeLine);
-      otbMsgDevMacro(<< "regionSize                               = " << regionSize);
+      otbMsgDevMacro(<< "sizeLine                                 = " << sizeLineInBytes);
+      otbMsgDevMacro(<< "regionSize                               = " << regionSizeInBytes);
       otbMsgDevMacro(<< "BufferMemorySize                         = " << bufferMemorySize);
-      otbMsgDevMacro(<< "bufferMemorySizeOctet                    = " << bufferMemorySizeOctet);
 
       //Active streaming
-      if (regionSize > bufferMemorySizeOctet)
+      if (regionSizeInBytes > bufferMemorySize)
         {
         //The regionSize must be at list equal to the sizeLine
-        if (regionSize < sizeLine)
+        if (regionSizeInBytes < sizeLineInBytes)
           {
           otbMsgDevMacro(<< "Force buffer size.");
-          regionSize = sizeLine;
+          regionSizeInBytes = sizeLineInBytes;
           }
         //Calculate NumberOfStreamDivisions
         numDivisions = static_cast<unsigned long>(
-          vcl_ceil(static_cast<double>(regionSize) / static_cast<double>(bufferMemorySizeOctet))
+          vcl_ceil(static_cast<double>(regionSizeInBytes) / static_cast<double>(bufferMemorySize))
           );
         }
       else
@@ -161,6 +161,19 @@ unsigned long StreamingTraitsBase<TImage>
 
         otbMsgDevMacro(<< "streamMaxSizeBufferForStreaming in Bytes     = " << streamMaxSizeBufferForStreamingInBytes);
 
+
+        // Is the splitter a otb::ImageRegionSquareTileSplitter ?
+        otb::ImageRegionSquareTileSplitter<2>* squareTileSplitter = dynamic_cast<otb::ImageRegionSquareTileSplitter<2>*>(splitter);
+        if (squareTileSplitter)
+          {
+          // in that case, inform it about PixelSize so that the tiles
+          squareTileSplitter->SetPixelSizeInBytes(static_cast<std::streamoff>(image->GetNumberOfComponentsPerPixel()) *
+                                                  static_cast<std::streamoff>(sizeof(PixelType)));
+
+          squareTileSplitter->SetTileSizeInBytes(streamMaxSizeBufferForStreamingInBytes);
+          }
+
+
         //Calculate NumberOfStreamDivisions
         numDivisions =
           static_cast<unsigned long>(vcl_ceil(static_cast<double>(regionSizeInBytes) /

Testing/Code/Common/CMakeLists.txt

@@ -736,6 +736,19 @@ ADD_TEST(coTvImageRegionTileMapSplitter ${COMMON_TESTS8}
         ${TEMP}/coImageRegionTileMapSplitter.txt
 )
 
+# -------------  otb::ImageRegionSquareTileSplitter ----------------------------
+ADD_TEST(coTuImageRegionSquareTileSplitterNew ${COMMON_TESTS8}
+         otbImageRegionSquareTileSplitterNew
+)
+
+ADD_TEST(coTvImageRegionSquareTileSplitter ${COMMON_TESTS8}
+    --compare-ascii ${NOTOL}
+        ${BASELINE_FILES}/coImageRegionTileMapSplitter.txt
+                ${TEMP}/coImageRegionTileMapSplitter.txt
+    otbImageRegionSquareTileSplitter
+        ${TEMP}/coImageRegionTileMapSplitter.txt
+)
+
 # -------------  otb::ImageOfVectorsToMonoChannelExtractROI ----------------------------
 ADD_TEST(coTuImageOfVectorsToMonoChannelExtractROINew ${COMMON_TESTS8}
 otbImageOfVectorsToMonoChannelExtractROINew
@@ -1103,6 +1116,7 @@ otbQuickLookImageGeneratorNew.cxx
 otbQuickLookImageGenerator.cxx
 otbImageRegionTileMapSplitterNew.cxx
 otbImageRegionTileMapSplitter.cxx
+otbImageRegionSquareTileSplitter.cxx
 otbImageOfVectorsToMonoChannelExtractROINew.cxx
 otbImageOfVectorsToMonoChannelExtractROI.cxx
 otbImageRegionNonUniformMultidimensionalSplitterNew.cxx

Testing/Code/Common/otbCommonTests8.cxx

@@ -30,6 +30,8 @@ void RegisterTests()
   REGISTER_TEST(otbQuickLookImageGenerator);
   REGISTER_TEST(otbImageRegionTileMapSplitterNew);
   REGISTER_TEST(otbImageRegionTileMapSplitter);
+  REGISTER_TEST(otbImageRegionSquareTileSplitterNew);
+  REGISTER_TEST(otbImageRegionSquareTileSplitter);
   REGISTER_TEST(otbImageOfVectorsToMonoChannelExtractROINew);
   REGISTER_TEST(otbImageOfVectorsToMonoChannelExtractROI);
   REGISTER_TEST(otbImageRegionNonUniformMultidimensionalSplitterNew);

Testing/Code/Common/otbImageRegionSquareTileSplitter.cxx

+/*=========================================================================
+
+  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.
+
+=========================================================================*/
+#include "otbImageRegionSquareTileSplitter.h"
+#include <fstream>
+
+const int Dimension = 2;
+typedef otb::ImageRegionSquareTileSplitter<Dimension> SplitterType;
+
+int otbImageRegionSquareTileSplitterNew(int argc, char * argv[])
+{
+  SplitterType::Pointer splitter = SplitterType::New();
+
+  std::cout << splitter << std::endl;
+
+  return EXIT_SUCCESS;
+}
+
+int otbImageRegionSquareTileSplitter(int argc, char * argv[])
+{
+  typedef SplitterType::IndexType                      IndexType;
+  typedef SplitterType::SizeType                       SizeType;
+  typedef SplitterType::RegionType                     RegionType;
+
+  typedef unsigned short PixelPrecisionType;
+  const unsigned int NbComponents = 8;
+  const unsigned int PixelSizeInBytes = NbComponents * sizeof(PixelPrecisionType);
+
+  std::ofstream outfile(argv[1]);
+  SplitterType::Pointer filter = FilterType::New();
+
+  RegionType   region, region2;
+  unsigned int nb, nbSplitTheoric, nbAsked;
+  IndexType    index;
+  SizeType     size;
+
+  //Case 1
+  index[0] = 45;
+  index[1] = 45;
+  size[0] = 1000;
+  size[1] = 1500;
+  nbSplitTheoric = 10;
+  nbAsked = 2;
+
+  region.SetSize(size);
+  region.SetIndex(index);
+
+  nb = filter->GetNumberOfSplits(region, nbSplitTheoric);
+  region2 = filter->GetSplit(nbAsked, nb, region);
+
+  outfile << "\nCase 1 \n";
+  outfile << "Input region: " << region << std::endl;
+  outfile << "Input NumberOfSplits: " << nbSplitTheoric << std::endl;
+  outfile << "Output GetNumberOfSplits: " << nb << std::endl;
+  outfile << "Output GetSplit(" << nbAsked << "," << nb << ", input region): " << std::endl;
+  outfile << "Output region: " << region2 << std::endl;
+
+  //Case 2
+  index[0] = 45;
+  index[1] = 45;
+  size[0] = 1048576;
+  size[1] = 1048576;
+  nbSplitTheoric = 16777216;
+  nbAsked = 2;
+
+  region.SetSize(size);
+  region.SetIndex(index);
+
+  nb = filter->GetNumberOfSplits(region, nbSplitTheoric);
+  region2 = filter->GetSplit(nbAsked, nb, region);
+
+  outfile << "\nCase 2 \n";
+  outfile << "Input region: " << region << std::endl;
+  outfile << "Input NumberOfSplits: " << nbSplitTheoric << std::endl;
+  outfile << "Output GetNumberOfSplits: " << nb << std::endl;
+  outfile << "Output GetSplit(" << nbAsked << "," << nb << ", input region): " << std::endl;
+  outfile << "Output region: " << region2 << std::endl;
+
+  //Case 3
+  index[0] = 45;
+  index[1] = 45;
+  size[0] = 1048576;
+  size[1] = 1048576;
+  nbSplitTheoric = 23;
+  nbAsked = 4;
+
+  region.SetSize(size);
+  region.SetIndex(index);
+
+  nb = filter->GetNumberOfSplits(region, nbSplitTheoric);
+  region2 = filter->GetSplit(nbAsked, nb, region);
+
+  outfile << "\nCase 3 \n";
+  outfile << "Input region: " << region << std::endl;
+  outfile << "Input NumberOfSplits: " << nbSplitTheoric << std::endl;
+  outfile << "Output GetNumberOfSplits: " << nb << std::endl;
+  outfile << "Output GetSplit(" << nbAsked << "," << nb << ", input region): " << std::endl;
+  outfile << "Output region: " << region2 << std::endl;
+
+  //Case 4
+  index[0] = 45;
+  index[1] = 45;
+  size[0] = 1048576;
+  size[1] = 1024;
+  nbSplitTheoric = 16777216;
+  nbAsked = 16387;
+
+  region.SetSize(size);
+  region.SetIndex(index);
+
+  nb = filter->GetNumberOfSplits(region, nbSplitTheoric);
+  region2 = filter->GetSplit(nbAsked, nb, region);
+
+  outfile << "\nCase 4 \n";
+  outfile << "Input region: " << region << std::endl;
+  outfile << "Input NumberOfSplits: " << nbSplitTheoric << std::endl;
+  outfile << "Output GetNumberOfSplits: " << nb << std::endl;
+  outfile << "Output GetSplit(" << nbAsked << "," << nb << ", input region): " << std::endl;
+  outfile << "Output region: " << region2 << std::endl;
+
+  //Case 5
+  index[0] = 0;
+  index[1] = 0;
+  size[0] = 513;
+  size[1] = 5376;
+  nbSplitTheoric = 8;
+  nbAsked = 9;
+
+  region.SetSize(size);
+  region.SetIndex(index);
+
+  nb = filter->GetNumberOfSplits(region, nbSplitTheoric);
+  region2 = filter->GetSplit(nbAsked, nb, region);
+
+  outfile << "\nCase 5 \n";
+  outfile << "Input region: " << region << std::endl;
+  outfile << "Input NumberOfSplits: " << nbSplitTheoric << std::endl;
+  outfile << "Output GetNumberOfSplits: " << nb << std::endl;
+  outfile << "Output GetSplit(" << nbAsked << "," << nb << ", input region): " << std::endl;
+  outfile << "Output region: " << region2 << std::endl;
+
+  //Case 6
+  index[0] = 0;
+  index[1] = 0;
+  size[0] = 3;
+  size[1] = 2;
+  nbSplitTheoric = 5;
+  nbAsked = 0;
+
+  region.SetSize(size);
+  region.SetIndex(index);
+
+  nb = filter->GetNumberOfSplits(region, nbSplitTheoric);
+  region2 = filter->GetSplit(nbAsked, nb, region);
+
+  outfile << "\nCase 5 \n";
+  outfile << "Input region: " << region << std::endl;
+  outfile << "Input NumberOfSplits: " << nbSplitTheoric << std::endl;
+  outfile << "Output GetNumberOfSplits: " << nb << std::endl;
+  outfile << "Output GetSplit(" << nbAsked << "," << nb << ", input region): " << std::endl;