gdcmRescaler.h

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/*=========================================================================

  Program: GDCM (Grassroots DICOM). A DICOM library

  Copyright (c) 2006-2011 Mathieu Malaterre
  All rights reserved.
  See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html 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.

=========================================================================*/
#ifndef GDCMRESCALER_H
#define GDCMRESCALER_H

#include "gdcmTypes.h"
#include "gdcmPixelFormat.h"

namespace gdcm
{

class GDCM_EXPORT Rescaler
{
public:
  Rescaler():Intercept(0),Slope(1),PF(PixelFormat::UNKNOWN),TargetScalarType(PixelFormat::UNKNOWN), ScalarRangeMin(0), ScalarRangeMax(0), UseTargetPixelType(false) {}
  ~Rescaler() {}

  bool Rescale(char *out, const char *in, size_t n);

  bool InverseRescale(char *out, const char *in, size_t n);

  void SetIntercept(double i) { Intercept = i; }
  double GetIntercept() const { return Intercept; }

  void SetSlope(double s) { Slope = s; }
  double GetSlope() const { return Slope; }

  void SetTargetPixelType( PixelFormat const & targetst );

  void SetUseTargetPixelType(bool b);

  void SetPixelFormat(PixelFormat const & pf) { PF = pf; }

  PixelFormat::ScalarType ComputeInterceptSlopePixelType();

  void SetMinMaxForPixelType(double min, double max)
    {
    ScalarRangeMin = min;
    ScalarRangeMax = max;
    }

  PixelFormat ComputePixelTypeFromMinMax();

protected:
  template <typename TIn>
    void RescaleFunctionIntoBestFit(char *out, const TIn *in, size_t n);
  template <typename TIn>
    void InverseRescaleFunctionIntoBestFit(char *out, const TIn *in, size_t n);

private:
  double Intercept; // 0028,1052
  double Slope;     // 0028,1053
  PixelFormat PF;
  PixelFormat::ScalarType TargetScalarType;
  double ScalarRangeMin;
  double ScalarRangeMax;
  bool UseTargetPixelType;
};

} // end namespace gdcm

#endif //GDCMRESCALER_H