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114 lines
3.5 KiB
114 lines
3.5 KiB
2 years ago
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/*=========================================================================
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Program: Visualization Toolkit
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Module: $RCSfile: vtkImageLogarithmicScale.cxx,v $
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Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
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All rights reserved.
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See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
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This software is distributed WITHOUT ANY WARRANTY; without even
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the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the above copyright notice for more information.
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=========================================================================*/
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#include "vtkImageLogarithmicScale.h"
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#include "vtkImageData.h"
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#include "vtkImageProgressIterator.h"
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#include "vtkObjectFactory.h"
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#include <math.h>
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vtkCxxRevisionMacro(vtkImageLogarithmicScale, "$Revision: 1.26 $");
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vtkStandardNewMacro(vtkImageLogarithmicScale);
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//----------------------------------------------------------------------------
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// Constructor sets default values
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vtkImageLogarithmicScale::vtkImageLogarithmicScale()
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{
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this->SetNumberOfInputPorts(1);
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this->SetNumberOfOutputPorts(1);
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this->Constant = 10.0;
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}
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//----------------------------------------------------------------------------
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// This templated function executes the filter for any type of data.
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template <class T>
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void vtkImageLogarithmicScaleExecute(vtkImageLogarithmicScale *self,
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vtkImageData *inData,
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vtkImageData *outData,
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int outExt[6], int id, T *)
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{
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vtkImageIterator<T> inIt(inData, outExt);
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vtkImageProgressIterator<T> outIt(outData, outExt, self, id);
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double c;
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c = self->GetConstant();
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// Loop through ouput pixels
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while (!outIt.IsAtEnd())
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{
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T* inSI = inIt.BeginSpan();
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T* outSI = outIt.BeginSpan();
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T* outSIEnd = outIt.EndSpan();
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while (outSI != outSIEnd)
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{
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// Pixel operation
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if (*inSI > 0)
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{
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*outSI = (T)(c*log((double)(*inSI)+1.0));
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}
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else
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{
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*outSI = (T)(-c*log(1.0-(double)(*inSI)));
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}
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outSI++;
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inSI++;
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}
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inIt.NextSpan();
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outIt.NextSpan();
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}
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}
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//----------------------------------------------------------------------------
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// This method is passed a input and output region, and executes the filter
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// algorithm to fill the output from the input.
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// It just executes a switch statement to call the correct function for
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// the regions data types.
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void vtkImageLogarithmicScale::ThreadedExecute (vtkImageData *inData,
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vtkImageData *outData,
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int outExt[6], int id)
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{
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// this filter expects that input is the same type as output.
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if (inData->GetScalarType() != outData->GetScalarType())
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{
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vtkErrorMacro(<< "Execute: input ScalarType, "
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<< inData->GetScalarType()
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<< ", must match out ScalarType "
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<< outData->GetScalarType());
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return;
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}
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switch (inData->GetScalarType())
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{
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vtkTemplateMacro(
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vtkImageLogarithmicScaleExecute(this, inData,
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outData, outExt, id,
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static_cast<VTK_TT *>(0)));
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default:
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vtkErrorMacro(<< "Execute: Unknown input ScalarType");
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return;
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}
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}
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void vtkImageLogarithmicScale::PrintSelf(ostream& os, vtkIndent indent)
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{
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this->Superclass::PrintSelf(os,indent);
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os << indent << "Constant: " << this->Constant << "\n";
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}
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