《itk实用demo》-非线性映射,线性映射

非线性映射

 typedef itk::SigmoidImageFilter <ImageType, ImageType> SigmoidImageFilterType;
 SigmoidImageFilterType::Pointer sigmoidFilter = SigmoidImageFilterType::New();
 sigmoidFilter->SetInput(imagedata);
 sigmoidFilter->SetOutputMinimum(-1024);
 sigmoidFilter->SetOutputMaximum(800);
 sigmoidFilter->SetAlpha(100.0);
 sigmoidFilter->SetBeta(150.0);

线性映射

#include "itkClampImageFilter.h"
  typedef itk::ClampImageFilter< FloatImageType, UnsignedCharImageType > ClampFilterType;
  ClampFilterType::Pointer clampFilter = ClampFilterType::New();
  clampFilter->SetInput(image);
  clampFilter->Update();
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#include "itkCastImageFilter.h"
  typedef itk::CastImageFilter< FloatImageType, UnsignedCharImageType > CastFilterType;
  CastFilterType::Pointer castFilter = CastFilterType::New();
  castFilter->SetInput(reader->GetOutput());
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#include "itkRescaleIntensityImageFilter.h"
  typedef itk::RescaleIntensityImageFilter< ImageType, ImageType > RescaleFilterType;
  RescaleFilterType::Pointer rescaleFilter = RescaleFilterType::New();
  rescaleFilter->SetInput(reader->GetOutput());
  rescaleFilter->SetOutputMinimum(0);
  rescaleFilter->SetOutputMaximum(255);
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itkShiftScaleImageFilter.h
typedef itk::ShiftScaleImageFilter< ImageType, ImageType > ScaleFilterType;
ScaleFilterType::Pointer shiftFliter= ScaleFilterType::New();  
shiftFliter->SetInput(reader->GetOutput());
shiftFliter->SetScale(1.2);
shiftFliter->SetShift(25);
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#include "itkNormalizeImageFilter.h"
  typedef itk::NormalizeImageFilter< FloatImageType, FloatImageType >
    NormalizeFilterType;
  NormalizeFilterType::Pointer normalizeFilter = NormalizeFilterType::New();
  normalizeFilter->SetInput(reader->GetOutput());