ITK  4.4.0
Insight Segmentation and Registration Toolkit
itkColormapFunction.h
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5  * Licensed under the Apache License, Version 2.0 (the "License");
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18 #ifndef __itkColormapFunction_h
19 #define __itkColormapFunction_h
20 
21 #include "itkObject.h"
22 #include "itkObjectFactory.h"
23 #include "itkNumericTraits.h"
24 #include "itkRGBPixel.h"
25 
26 namespace itk
27 {
28 namespace Function
29 {
45 template< class TScalar, class TRGBPixel >
46 class ITK_EXPORT ColormapFunction:public Object
47 {
48 public:
49 
51  typedef Object Superclass;
54 
56  itkTypeMacro(ColormapFunction, Object);
57 
58  typedef TRGBPixel RGBPixelType;
59  typedef typename TRGBPixel::ComponentType RGBComponentType;
60  typedef TScalar ScalarType;
62 
63  itkSetMacro(MinimumRGBComponentValue, RGBComponentType);
64  itkGetConstMacro(MinimumRGBComponentValue, RGBComponentType);
65 
66  itkSetMacro(MaximumRGBComponentValue, RGBComponentType);
67  itkGetConstMacro(MaximumRGBComponentValue, RGBComponentType);
68 
69  itkSetMacro(MinimumInputValue, ScalarType);
70  itkGetConstMacro(MinimumInputValue, ScalarType);
71 
72  itkSetMacro(MaximumInputValue, ScalarType);
73  itkGetConstMacro(MaximumInputValue, ScalarType);
74 
75  virtual bool operator!=(const ColormapFunction &) const
76  {
77  return false;
78  }
79 
80  virtual bool operator==(const ColormapFunction & other) const
81  {
82  return !( *this != other );
83  }
84 
85  virtual RGBPixelType operator()(const ScalarType &) const = 0;
86 
87 protected:
89  {
90  this->m_MinimumInputValue = NumericTraits< TScalar >::min();
91  this->m_MaximumInputValue = NumericTraits< TScalar >::max();
92  this->m_MinimumRGBComponentValue = NumericTraits< RGBComponentType >::min();
93  this->m_MaximumRGBComponentValue = NumericTraits< RGBComponentType >::max();
94  }
95 
97 
101  RealType RescaleInputValue(ScalarType v) const
102  {
103  RealType d = static_cast< RealType >( this->m_MaximumInputValue -
104  this->m_MinimumInputValue );
105  RealType value = ( static_cast< RealType >( v ) -
106  static_cast< RealType >( this->m_MinimumInputValue ) ) / d;
108 
109  value = vnl_math_max(0.0, value);
110  value = vnl_math_min(1.0, value);
111  return value;
112  }
113 
117  RGBComponentType RescaleRGBComponentValue(RealType v) const
118  {
119  RealType d = static_cast< RealType >( m_MaximumRGBComponentValue -
120  m_MinimumRGBComponentValue );
121  const RGBComponentType rescaled = static_cast< RGBComponentType >(
122  d * v ) + this->m_MinimumRGBComponentValue;
124 
125  return rescaled;
126  }
127 
128  void PrintSelf(std::ostream & os, Indent indent) const
129  {
130  Superclass::PrintSelf(os, indent);
131 
132  os << indent << "Minimum RGB Component Value: "
133  << static_cast< typename NumericTraits< RGBComponentType >::PrintType >(
134  this->GetMinimumRGBComponentValue() ) << std::endl;
135  os << indent << "Maximum RGB Component Value: "
136  << static_cast< typename NumericTraits< RGBComponentType >::PrintType >(
137  this->GetMaximumRGBComponentValue() ) << std::endl;
138  os << indent << "Minimum Input Value: "
139  << static_cast< typename NumericTraits< ScalarType >::PrintType >(
140  this->GetMinimumInputValue() ) << std::endl;
141  os << indent << "Maximum Input Value: "
142  << static_cast< typename NumericTraits< ScalarType >::PrintType >(
143  this->GetMaximumInputValue() ) << std::endl;
144  }
145 
146 private:
147  ColormapFunction(const Self &); //purposely not implemented
148  void operator=(const Self &); //purposely not implemented
149 
152 
155 };
156 } // end namespace functor
157 } // end namespace itk
158 
159 #endif
160