/usr/include/ITK-4.5/itkImageRandomNonRepeatingConstIteratorWithIndex.hxx is in libinsighttoolkit4-dev 4.5.0-3.
This file is owned by root:root, with mode 0o644.
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*
* Copyright Insight Software Consortium
*
* 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.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 __itkImageRandomNonRepeatingConstIteratorWithIndex_hxx
#define __itkImageRandomNonRepeatingConstIteratorWithIndex_hxx
#include "itkImageRandomNonRepeatingConstIteratorWithIndex.h"
namespace itk
{
/** Default constructor. Needed since we provide a cast constructor. */
template< typename TImage >
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::ImageRandomNonRepeatingConstIteratorWithIndex():ImageConstIteratorWithIndex< TImage >()
{
m_NumberOfPixelsInRegion = 0L;
m_NumberOfSamplesRequested = 0L;
m_NumberOfSamplesDone = 0L;
m_Permutation = NULL;
}
/** Constructor establishes an iterator to walk a particular image and a
* particular region of that image. */
template< typename TImage >
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::ImageRandomNonRepeatingConstIteratorWithIndex(const ImageType *ptr, const RegionType & region):
ImageConstIteratorWithIndex< TImage >(ptr, region)
{
m_NumberOfPixelsInRegion = region.GetNumberOfPixels();
m_NumberOfSamplesRequested = 0L;
m_NumberOfSamplesDone = 0L;
m_Permutation = new RandomPermutation(m_NumberOfPixelsInRegion);
}
//----------------------------------------------------------------------
// Assignment Operator
//----------------------------------------------------------------------
template< typename TImage >
ImageRandomNonRepeatingConstIteratorWithIndex< TImage > &
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::operator=(const Self & it)
{
if(this != &it)
{
this->ImageConstIteratorWithIndex< TImage >::operator=(it);
if(m_Permutation)
{
*m_Permutation = *(it.m_Permutation);
}
else
{
m_NumberOfPixelsInRegion = it.GetRegion().GetNumberOfPixels();
m_NumberOfSamplesRequested = 0L;
m_NumberOfSamplesDone = 0L;
m_Permutation = new RandomPermutation(m_NumberOfPixelsInRegion);
}
}
return *this;
}
/** Set the number of samples to extract from the region */
template< typename TImage >
void
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::SetNumberOfSamples(SizeValueType number)
{
m_NumberOfSamplesRequested = number;
if ( number > m_NumberOfPixelsInRegion ) { m_NumberOfSamplesRequested = m_NumberOfPixelsInRegion; }
}
/** Set the number of samples to extract from the region */
template< typename TImage >
typename ImageRandomNonRepeatingConstIteratorWithIndex< TImage >::SizeValueType
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::GetNumberOfSamples(void) const
{
return m_NumberOfSamplesRequested;
}
/** Reinitialize the seed of the random number generator */
template< typename TImage >
void
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::ReinitializeSeed()
{
this->m_Permutation->ReinitializeSeed();
this->m_Permutation->Shuffle();
}
template< typename TImage >
void
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::ReinitializeSeed(int seed)
{
this->m_Permutation->ReinitializeSeed(seed);
this->m_Permutation->Shuffle();
}
/** update the position */
template< typename TImage >
void
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::SetPriorityImage(const PriorityImageType *priorityImage)
{
// should probably do error checking to be sure that the priority
// image is the right size
typedef SizeValueType PositionValueType;
for (PositionValueType pixel = 0; pixel < m_NumberOfPixelsInRegion; pixel++ )
{
PositionValueType position = pixel;
IndexType positionIndex;
for ( unsigned int dim = 0; dim < TImage::ImageDimension; dim++ )
{
const SizeValueType sizeInThisDimension = this->m_Region.GetSize()[dim];
const PositionValueType residual = position % sizeInThisDimension;
positionIndex[dim] = residual + this->m_BeginIndex[dim];
position -= residual;
position /= sizeInThisDimension;
}
//std::cout<<pixel<<" "<<positionIndex<<"
// "<<priorityImage->GetPixel(positionIndex)std::endl;
this->m_Permutation->SetPriority( pixel, priorityImage->GetPixel(positionIndex) );
}
this->m_Permutation->Shuffle();
}
/** update the position */
template< typename TImage >
void
ImageRandomNonRepeatingConstIteratorWithIndex< TImage >
::UpdatePosition()
{
typedef IndexValueType PositionValueType;
PositionValueType position = ( *( this->m_Permutation ) )[m_NumberOfSamplesDone % m_NumberOfSamplesRequested];
for ( unsigned int dim = 0; dim < TImage::ImageDimension; dim++ )
{
const SizeValueType sizeInThisDimension = this->m_Region.GetSize()[dim];
const PositionValueType residual = position % sizeInThisDimension;
this->m_PositionIndex[dim] = residual + this->m_BeginIndex[dim];
position -= residual;
position /= sizeInThisDimension;
}
this->m_Position = this->m_Image->GetBufferPointer() + this->m_Image->ComputeOffset(this->m_PositionIndex);
}
} // end namespace itk
#endif
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