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/*=========================================================================
Program: Visualization Toolkit
Module: $RCSfile: vtkImageLogarithmicScale.cxx,v $
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm 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 notice for more information.
=========================================================================*/
#include "vtkImageLogarithmicScale.h"
#include "vtkImageData.h"
#include "vtkImageProgressIterator.h"
#include "vtkObjectFactory.h"
#include <math.h>
vtkCxxRevisionMacro(vtkImageLogarithmicScale, "$Revision: 1.26 $");
vtkStandardNewMacro(vtkImageLogarithmicScale);
//----------------------------------------------------------------------------
// Constructor sets default values
vtkImageLogarithmicScale::vtkImageLogarithmicScale()
{
this->SetNumberOfInputPorts(1);
this->SetNumberOfOutputPorts(1);
this->Constant = 10.0;
}
//----------------------------------------------------------------------------
// This templated function executes the filter for any type of data.
template <class T>
void vtkImageLogarithmicScaleExecute(vtkImageLogarithmicScale *self,
vtkImageData *inData,
vtkImageData *outData,
int outExt[6], int id, T *)
{
vtkImageIterator<T> inIt(inData, outExt);
vtkImageProgressIterator<T> outIt(outData, outExt, self, id);
double c;
c = self->GetConstant();
// Loop through ouput pixels
while (!outIt.IsAtEnd())
{
T* inSI = inIt.BeginSpan();
T* outSI = outIt.BeginSpan();
T* outSIEnd = outIt.EndSpan();
while (outSI != outSIEnd)
{
// Pixel operation
if (*inSI > 0)
{
*outSI = (T)(c*log((double)(*inSI)+1.0));
}
else
{
*outSI = (T)(-c*log(1.0-(double)(*inSI)));
}
outSI++;
inSI++;
}
inIt.NextSpan();
outIt.NextSpan();
}
}
//----------------------------------------------------------------------------
// This method is passed a input and output region, and executes the filter
// algorithm to fill the output from the input.
// It just executes a switch statement to call the correct function for
// the regions data types.
void vtkImageLogarithmicScale::ThreadedExecute (vtkImageData *inData,
vtkImageData *outData,
int outExt[6], int id)
{
// this filter expects that input is the same type as output.
if (inData->GetScalarType() != outData->GetScalarType())
{
vtkErrorMacro(<< "Execute: input ScalarType, "
<< inData->GetScalarType()
<< ", must match out ScalarType "
<< outData->GetScalarType());
return;
}
switch (inData->GetScalarType())
{
vtkTemplateMacro(
vtkImageLogarithmicScaleExecute(this, inData,
outData, outExt, id,
static_cast<VTK_TT *>(0)));
default:
vtkErrorMacro(<< "Execute: Unknown input ScalarType");
return;
}
}
void vtkImageLogarithmicScale::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os,indent);
os << indent << "Constant: " << this->Constant << "\n";
}
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