/usr/include/ITK-4.5/itkGridImageSource.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 __itkGridImageSource_hxx
#define __itkGridImageSource_hxx
#include "itkGaussianKernelFunction.h"
#include "itkGridImageSource.h"
#include "itkImageLinearIteratorWithIndex.h"
#include "itkImageRegionIteratorWithIndex.h"
#include "itkProgressReporter.h"
namespace itk
{
template< typename TOutputImage >
GridImageSource< TOutputImage >
::GridImageSource()
{
this->m_Sigma.Fill(0.5);
this->m_GridSpacing.Fill(4.0);
this->m_GridOffset.Fill(0.0);
this->m_WhichDimensions.Fill(true);
this->m_Scale = 255.0;
this->m_KernelFunction = dynamic_cast< KernelFunctionType * >(
GaussianKernelFunction<double>::New().GetPointer() );
}
template< typename TOutputImage >
void
GridImageSource< TOutputImage >
::BeforeThreadedGenerateData()
{
ImageType* output = this->GetOutput(0);
this->m_PixelArrays = PixelArrayContainerType::New();
m_PixelArrays->Initialize();
for ( unsigned int i = 0; i < ImageDimension; i++ )
{
if ( this->m_GridOffset[i] > this->m_GridSpacing[i] )
{
this->m_GridOffset[i] = this->m_GridSpacing[i];
}
PixelArrayType pixels = m_PixelArrays->CreateElementAt(i);
pixels.set_size(this->GetSize()[i]);
pixels.fill(1);
if ( this->m_WhichDimensions[i] )
{
ImageLinearIteratorWithIndex< ImageType > It( output, output->GetRequestedRegion() );
It.SetDirection(i);
/** Add two extra functions in the front and one in the back to ensure
coverage */
unsigned int numberOfGaussians = Math::Ceil< unsigned int >(
this->GetSize()[i] * output->GetSpacing()[i] / this->m_GridSpacing[i]) + 4u;
for ( It.GoToBegin(); !It.IsAtEndOfLine(); ++It )
{
typename ImageType::IndexType index = It.GetIndex();
typename ImageType::PointType point;
output->TransformIndexToPhysicalPoint(index, point);
RealType val = 0;
for ( unsigned int j = 0; j < numberOfGaussians; j++ )
{
RealType num = point[i] - static_cast< RealType >( j - 2 ) * this->m_GridSpacing[i]
- output->GetOrigin()[i] - this->m_GridOffset[i];
val += this->m_KernelFunction->Evaluate(num / this->m_Sigma[i]);
}
pixels[index[i]] = val;
}
pixels = 1.0 - pixels / pixels.max_value();
}
this->m_PixelArrays->SetElement(i, pixels);
}
}
template< typename TOutputImage >
void
GridImageSource< TOutputImage >
::ThreadedGenerateData(const ImageRegionType & outputRegionForThread, ThreadIdType threadId)
{
// Support progress methods/callbacks
ProgressReporter progress( this, threadId, outputRegionForThread.GetNumberOfPixels() );
ImageType* output = this->GetOutput(0);
ImageRegionIteratorWithIndex< ImageType > It(output, outputRegionForThread);
for ( It.GoToBegin(); !It.IsAtEnd(); ++It )
{
RealType val = 1.0;
typename ImageType::IndexType index = It.GetIndex();
for ( unsigned int i = 0; i < ImageDimension; i++ )
{
val *= this->m_PixelArrays->GetElement(i)[index[i]];
}
It.Set( static_cast<PixelType>(m_Scale * val) );
progress.CompletedPixel();
}
}
template< typename TOutputImage >
void
GridImageSource< TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Output image information: " << std::endl;
os << indent << " Scale = " << this->GetScale() << std::endl;
os << indent << "Grid information: " << std::endl;
os << indent << " WhichDimensions = " << this->GetWhichDimensions() << std::endl;
os << indent << " Kernel = " << this->GetKernelFunction() << std::endl;
os << indent << " Sigma = " << this->GetSigma() << std::endl;
os << indent << " Grid spacing = " << this->GetGridSpacing() << std::endl;
os << indent << " Grid offset = " << this->GetGridOffset() << std::endl;
}
} // end namespace itk
#endif
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