/usr/include/gdcm-2.6/gdcmImageChangePhotometricInterpretation.h is in libgdcm2-dev 2.6.6-3.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 | /*=========================================================================
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 GDCMIMAGECHANGEPHOTOMETRICINTERPRETATION_H
#define GDCMIMAGECHANGEPHOTOMETRICINTERPRETATION_H
#include "gdcmImageToImageFilter.h"
#include "gdcmPhotometricInterpretation.h"
namespace gdcm
{
class DataElement;
/**
* \brief ImageChangePhotometricInterpretation class
* \details Class to change the Photometric Interpetation of an input DICOM
*/
class GDCM_EXPORT ImageChangePhotometricInterpretation : public ImageToImageFilter
{
public:
ImageChangePhotometricInterpretation():PI() {}
~ImageChangePhotometricInterpretation() {}
/// Set/Get requested PhotometricInterpretation
void SetPhotometricInterpretation(PhotometricInterpretation const &pi) { PI = pi; }
const PhotometricInterpretation &GetPhotometricInterpretation() const { return PI; }
/// Change
bool Change();
/// colorspace converstion (based on CCIR Recommendation 601-2)
template <typename T>
static void RGB2YBR(T ybr[3], const T rgb[3]);
template <typename T>
static void YBR2RGB(T rgb[3], const T ybr[3]);
protected:
bool ChangeMonochrome();
private:
PhotometricInterpretation PI;
};
// http://en.wikipedia.org/wiki/YCbCr
template <typename T>
void ImageChangePhotometricInterpretation::RGB2YBR(T ybr[3], const T rgb[3])
{
#if 1
ybr[0] = 65.738 * rgb[0] + 129.057 * rgb[1] + 25.064 * rgb[2] + 16;
ybr[1] = -37.945 * rgb[0] + -74.494 * rgb[1] + 112.439 * rgb[2] + 128;
ybr[2] = 112.439 * rgb[0] + -94.154 * rgb[1] + -18.285 * rgb[2] + 128;
#else
const double R = rgb[0];
const double G = rgb[1];
const double B = rgb[2];
const double Y = .2990 * R + .5870 * G + .1140 * B;
const double CB = -.168736 * R - .331264 * G + .5000 * B + 128;
const double CR = .5000 * R - .418688 * G - .081312 * B + 128;
//assert( Y >= 0 && Y <= 255 );
//assert( CB >= 0 && CB <= 255 );
//assert( CR >= 0 && CR <= 255 );
ybr[0] = Y /*+ 0.5*/;
ybr[1] = CB /*+ 0.5*/;
ybr[2] = CR /*+ 0.5*/;
#endif
}
template <typename T>
void ImageChangePhotometricInterpretation::YBR2RGB(T rgb[3], const T ybr[3])
{
#if 1
rgb[0] = 298.082 * ((int)ybr[0]-16) + 0. * ((int)ybr[1]-128) + 408.583 * ((int)ybr[2]-128) - 1. / 256;
rgb[1] = 298.082 * ((int)ybr[0]-16) + -100.291 * ((int)ybr[1]-128) + -208.12 * ((int)ybr[2]-128) - 1. / 256;
rgb[2] = 298.082 * ((int)ybr[0]-16) + 516.411 * ((int)ybr[1]-128) + 0. * ((int)ybr[2]-128) - 1. / 256;
#else
const double Y = ybr[0];
const double Cb = ybr[1];
const double Cr = ybr[2];
//const double R = 1.0000e+00 * Y - 3.6820e-05 * CB + 1.4020e+00 * CR;
//const double G = 1.0000e+00 * Y - 3.4411e-01 * CB - 7.1410e-01 * CR;
//const double B = 1.0000e+00 * Y + 1.7720e+00 * CB - 1.3458e-04 * CR;
const double r = Y + 1.402 * (Cr-128);
const double g = Y - 0.344136 * (Cb-128) - 0.714136 * (Cr-128);
const double b = Y + 1.772 * (Cb-128);
double R = r < 0 ? 0 : r;
R = R > 255 ? 255 : R;
double G = g < 0 ? 0 : g;
G = G > 255 ? 255 : G;
double B = b < 0 ? 0 : b;
B = B > 255 ? 255 : B;
assert( R >= 0 && R <= 255 );
assert( G >= 0 && G <= 255 );
assert( B >= 0 && B <= 255 );
rgb[0] = ((R < 0 ? 0 : R) > 255 ? 255 : R);
rgb[1] = G;
rgb[2] = B;
#endif
}
} // end namespace gdcm
#endif //GDCMIMAGECHANGEPHOTOMETRICINTERPRETATION_H
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