/usr/include/ITK-4.5/itkGaussianImageSource.hxx is in libinsighttoolkit4-dev 4.5.0-3.
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 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 __itkGaussianImageSource_hxx
#define __itkGaussianImageSource_hxx
#include "itkGaussianImageSource.h"
#include "itkGaussianSpatialFunction.h"
#include "itkImageRegionIterator.h"
#include "itkProgressReporter.h"
#include "itkObjectFactory.h"
namespace itk
{
//----------------------------------------------------------------------------
template< typename TOutputImage >
GaussianImageSource< TOutputImage >
::GaussianImageSource()
{
// Gaussian parameters, defined so that the gaussian
// is centered in the default image
m_Mean.Fill(32.0);
m_Sigma.Fill(16.0);
m_Scale = 255.0;
m_Normalized = false;
}
//----------------------------------------------------------------------------
template< typename TOutputImage >
void
GaussianImageSource< TOutputImage >
::PrintSelf(std::ostream & os, Indent indent) const
{
Superclass::PrintSelf(os, indent);
os << indent << "Gaussian sigma: [";
for ( unsigned int ii = 0; ii < NDimensions; ++ii )
{
os << m_Sigma[ii];
if( ii != NDimensions - 1 )
{
os << ", ";
}
}
os << "]" << std::endl;
os << indent << "Gaussian mean: [";
for ( unsigned int ii = 0; ii < NDimensions; ++ii )
{
os << m_Mean[ii];
if( ii != NDimensions - 1 )
{
os << ", ";
}
}
os << "]" << std::endl;
os << indent << "Gaussian scale: " << m_Scale << std::endl;
os << indent << "Normalized Gaussian?: " << m_Normalized << std::endl;
}
//----------------------------------------------------------------------------
template< typename TOutputImage >
void
GaussianImageSource< TOutputImage >
::SetParameters(const ParametersType & parameters)
{
ArrayType sigma, mean;
for ( unsigned int i = 0; i < ArrayType::Length; i++ )
{
sigma[i] = parameters[i];
mean[i] = parameters[i + ArrayType::Length];
}
this->SetSigma( sigma );
this->SetMean( mean );
double scale = parameters[2*ArrayType::Length];
this->SetScale( scale );
}
//----------------------------------------------------------------------------
template< typename TOutputImage >
typename GaussianImageSource< TOutputImage >::ParametersType
GaussianImageSource< TOutputImage >
::GetParameters() const
{
ParametersType parameters( 2*ArrayType::Length + 1 );
for ( unsigned int i = 0; i < ArrayType::Length; i++ )
{
parameters[i] = m_Sigma[i];
parameters[i + ArrayType::Length] = m_Mean[i];
}
parameters[2*ArrayType::Length] = m_Scale;
return parameters;
}
//----------------------------------------------------------------------------
template< typename TOutputImage >
unsigned int
GaussianImageSource< TOutputImage >
::GetNumberOfParameters() const
{
return 2*ArrayType::Length + 1;
}
//----------------------------------------------------------------------------
template< typename TOutputImage >
void
GaussianImageSource< TOutputImage >
::GenerateData()
{
TOutputImage * outputPtr = this->GetOutput();
// allocate the output buffer
outputPtr->SetBufferedRegion( outputPtr->GetRequestedRegion() );
outputPtr->Allocate();
// Create and initialize a new gaussian function
typedef itk::GaussianSpatialFunction< double, NDimensions > FunctionType;
typedef typename FunctionType::InputType FunctionPositionType;
typename FunctionType::Pointer pGaussian = FunctionType::New();
pGaussian->SetSigma(m_Sigma);
pGaussian->SetMean(m_Mean);
pGaussian->SetScale(m_Scale);
pGaussian->SetNormalized(m_Normalized);
// Create an iterator that will walk the output region
typedef ImageRegionIterator< TOutputImage > OutputIterator;
OutputIterator outIt = OutputIterator( outputPtr,
outputPtr->GetRequestedRegion() );
// The value produced by the spatial function
double value;
// The position at which the function is evaluated
Point< double, TOutputImage::ImageDimension > evalPoint;
ProgressReporter progress( this, 0,
outputPtr->GetRequestedRegion()
.GetNumberOfPixels() );
// Walk the output image, evaluating the spatial function at each pixel
for (; !outIt.IsAtEnd(); ++outIt )
{
typename TOutputImage::IndexType index = outIt.GetIndex();
outputPtr->TransformIndexToPhysicalPoint(index, evalPoint);
value = pGaussian->Evaluate(evalPoint);
// Set the pixel value to the function value
outIt.Set( ( typename TOutputImage::PixelType )value );
progress.CompletedPixel();
}
}
} // end namespace itk
#endif
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