# gdcmRescaler.h

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    00001 /*=========================================================================
    00002
    00003   Program: GDCM (Grassroots DICOM). A DICOM library
    00004   Module:  $URL$
    00005
    00006   Copyright (c) 2006-2010 Mathieu Malaterre
    00007   All rights reserved.
    00008   See Copyright.txt or http://gdcm.sourceforge.net/Copyright.html for details.
    00009
    00010      This software is distributed WITHOUT ANY WARRANTY; without even
    00011      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00012      PURPOSE.  See the above copyright notice for more information.
    00013
    00014 =========================================================================*/
    00015 #ifndef GDCMRESCALER_H
    00016 #define GDCMRESCALER_H
    00017
    00018 #include "gdcmTypes.h"
    00019 #include "gdcmPixelFormat.h"
    00020
    00021 namespace gdcm
    00022 {
    00023
    00061 class GDCM_EXPORT Rescaler
    00062 {
    00063 public:
    00064   Rescaler():Intercept(0),Slope(1),PF(PixelFormat::UNKNOWN),TargetScalarType(PixelFormat::UNKNOWN), ScalarRangeMin(0), ScalarRangeMax(0), UseTargetPixelType(false) {}
    00065   ~Rescaler() {}
    00066
    00068   bool Rescale(char *out, const char *in, size_t n);
    00069
    00071   bool InverseRescale(char *out, const char *in, size_t n);
    00072
    00074   void SetIntercept(double i) { Intercept = i; }
    00075
    00077   void SetSlope(double s) { Slope = s; }
    00078
    00083   void SetTargetPixelType( PixelFormat const & targetst );
    00084
    00086   void SetUseTargetPixelType(bool b);
    00087
    00089   void SetPixelFormat(PixelFormat const & pf) { PF = pf; }
    00090
    00093   PixelFormat::ScalarType ComputeInterceptSlopePixelType();
    00094
    00097   void SetMinMaxForPixelType(double min, double max)
    00098     {
    00099     ScalarRangeMin = min;
    00100     ScalarRangeMax = max;
    00101     }
    00102
    00105   PixelFormat ComputePixelTypeFromMinMax();
    00106
    00107 protected:
    00108   template <typename TIn>
    00109     void RescaleFunctionIntoBestFit(char *out, const TIn *in, size_t n);
    00110   template <typename TIn>
    00111     void InverseRescaleFunctionIntoBestFit(char *out, const TIn *in, size_t n);
    00112
    00113 private:
    00114   double Intercept; // 0028,1052
    00115   double Slope;     // 0028,1053
    00116   PixelFormat PF;
    00117   PixelFormat::ScalarType TargetScalarType;
    00118   double ScalarRangeMin;
    00119   double ScalarRangeMax;
    00120   bool UseTargetPixelType;
    00121 };
    00122
    00123 } // end namespace gdcm
    00124
    00125 #endif //GDCMRESCALER_H