Orfeo Toolbox  4.0
itkLabelToRGBFunctor.h
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18 #ifndef __itkLabelToRGBFunctor_h
19 #define __itkLabelToRGBFunctor_h
20 
21 #include <vector>
22 #include "itkNumericTraits.h"
23 
24 namespace itk
25 {
26 namespace Functor
27 {
49 template< typename TLabel, typename TRGBPixel >
51 {
52 public:
53 
55 
57  {
58  TRGBPixel rgbPixel;
59 
60  typedef typename TRGBPixel::ValueType ValueType;
61 
62  // the following colors are from "R", and named:
63  // "red" "green3" "blue" "cyan"
64  //"magenta" "darkorange1" "darkgreen" "blueviolet"
65  //"brown4" "navy" "yellow4" "violetred1"
66  //"salmon4" "turquoise4" "sienna3" "darkorchid1"
67  //"springgreen4" "mediumvioletred" "orangered3" "lightseagreen"
68  //"slateblue" "deeppink1" "aquamarine4" "royalblue1"
69  //"tomato3" "mediumblue" "violetred4" "darkmagenta"
70  //"violet" "red4"
71  // They are a good selection of distinct colours for plotting and
72  // overlays.
73 
74  AddColor(255, 0, 0);
75  AddColor(0, 205, 0);
76  AddColor(0, 0, 255);
77  AddColor(0, 255, 255);
78  AddColor(255, 0, 255);
79  AddColor(255, 127, 0);
80  AddColor(0, 100, 0);
81  AddColor(138, 43, 226);
82  AddColor(139, 35, 35);
83  AddColor(0, 0, 128);
84  AddColor(139, 139, 0);
85  AddColor(255, 62, 150);
86  AddColor(139, 76, 57);
87  AddColor(0, 134, 139);
88  AddColor(205, 104, 57);
89  AddColor(191, 62, 255);
90  AddColor(0, 139, 69);
91  AddColor(199, 21, 133);
92  AddColor(205, 55, 0);
93  AddColor(32, 178, 170);
94  AddColor(106, 90, 205);
95  AddColor(255, 20, 147);
96  AddColor(69, 139, 116);
97  AddColor(72, 118, 255);
98  AddColor(205, 79, 57);
99  AddColor(0, 0, 205);
100  AddColor(139, 34, 82);
101  AddColor(139, 0, 139);
102  AddColor(238, 130, 238);
103  AddColor(139, 0, 0);
104 
105  // provide some default value for external use (outside
106  // LabelToRGBImageFilter)
107  // Inside LabelToRGBImageFilter, the values are always initialized
111  }
112 
113  inline TRGBPixel operator()(const TLabel & p) const
114  {
115  // value is background
116  // return a gray pixel with the same intensity than the label pixel
117  if ( p == m_BackgroundValue )
118  {
119  return m_BackgroundColor;
120  }
121 
122  // else, return a colored pixel from the color table
123  return m_Colors[p % m_Colors.size()];
124  }
125 
126  void AddColor(unsigned char r, unsigned char g, unsigned char b)
127  {
128  TRGBPixel rgbPixel;
130 
131  typedef typename TRGBPixel::ValueType ValueType;
132 
133  ValueType m = NumericTraits<ValueType>::max();
134 
135  rgbPixel[0] = static_cast< ValueType >( static_cast< double >( r ) / 255 * m );
136  rgbPixel[1] = static_cast< ValueType >( static_cast< double >( g ) / 255 * m );
137  rgbPixel[2] = static_cast< ValueType >( static_cast< double >( b ) / 255 * m );
138  m_Colors.push_back(rgbPixel);
139  }
140 
141  // Empty the color LUT
142  void ResetColors()
143  {
144  m_Colors.clear();
145  }
146 
147  // Get number of colors in the LUT
148  unsigned int GetNumberOfColors() const
149  {
150  return m_Colors.size();
151  }
152 
153  bool operator!=(const Self & l) const
154  {
155  const bool areDifferent = m_BackgroundColor != l.m_BackgroundColor
157 
158  return areDifferent;
159  }
160 
161  bool operator==(const Self & other) const
162  {
163  return !( *this != other );
164  }
165 
166  void SetBackgroundValue(TLabel v)
167  {
168  m_BackgroundValue = v;
169  }
170 
171  void SetBackgroundColor(TRGBPixel rgb)
172  {
173  m_BackgroundColor = rgb;
174  }
175 
177 
178  std::vector< TRGBPixel > m_Colors;
179 
180  TRGBPixel m_BackgroundColor;
181 
183 };
184 } // end namespace functor
185 } // end namespace itk
186 
187 #endif

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