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| RGBValue< T, RED_IDX, GREEN_IDX, BLUE_IDX > Class Template Reference |

Class for a single RGB value. More...

`#include <vigra/rgbvalue.hxx>`

Inheritance diagram for RGBValue< T, RED_IDX, GREEN_IDX, BLUE_IDX >:

## Public Types
enum |
typedef Base::const_iterator | const_iterator
typedef Base::iterator | iterator
typedef Base::NormType | NormType
typedef Base::SquaredNormType | SquaredNormType
typedef Base::value_type | value_type
Public Types inherited from TinyVectorBase< VALUETYPE, SIZE, VALUETYPE[SIZE], TinyVector< VALUETYPE, SIZE > >
enum |
typedef value_type const * | const_iterator
typedef VALUETYPE const * | const_pointer
typedef VALUETYPE const & | const_reference
typedef std::ptrdiff_t | difference_type
typedef value_type * | iterator
typedef SquareRootTraits < SquaredNormType > ::SquareRootResult | NormType
typedef VALUETYPE * | pointer
typedef VALUETYPE & | reference
typedef double | scalar_multiplier
typedef unsigned int | size_type
typedef NormTraits< VALUETYPE > ::SquaredNormType | SquaredNormType
typedef VALUETYPE | value_type

## Public Member Functions
value_type & | blue ()
value_type const & | blue () const
value_type & | green ()
value_type const & | green () const
value_type | luminance () const
NormType | magnitude () const
RGBValue | operator- () const
template<class U , unsigned int R, unsigned int G, unsigned int B>
RGBValue & | operator= (RGBValue< U, R, G, B > const &r)
RGBValue & | operator= (TinyVector< value_type, 3 > const &r)
value_type & | red ()
value_type const & | red () const
| RGBValue (value_type first, value_type second, value_type third)
| RGBValue (value_type gray)
| RGBValue (const_pointer i)
| RGBValue (const_pointer i, ReverseCopyTag reverse)
| RGBValue ()
template<class U , unsigned int R, unsigned int G, unsigned int B>
| RGBValue (RGBValue< U, R, G, B > const &r)
| RGBValue (TinyVector< value_type, 3 > const &r)
template<class V >
void | setBlue (V value)
template<class V >
void | setGreen (V value)
template<class V >
void | setRed (V value)
SquaredNormType | squaredMagnitude () const
Public Member Functions inherited from TinyVector< VALUETYPE, 3 >
TinyVector & | copy (TinyVectorBase< U, USIZE, DATA, DERIVED > const &r)
TinyVector & | operator= (TinyVector const &r)
TinyVector & | operator= (TinyVectorBase< U, SIZE, DATA, DERIVED > const &r)
TinyVector & | operator= (Diff2D const &r)
TinyVector & | operator= (value_type const &v)
| TinyVector (value_type const &initial)
| TinyVector (lemon::Invalid const &)
| TinyVector (Diff2D const &initial)
| TinyVector (value_type const &i1, value_type const &i2)
| TinyVector (value_type const &i1, value_type const &i2, value_type const &i3)
| TinyVector (value_type const &i1, value_type const &i2, value_type const &i3, value_type const &i4)
| TinyVector (value_type const &i1, value_type const &i2, value_type const &i3, value_type const &i4, value_type const &i5)
| TinyVector ()
| TinyVector (SkipInitializationTag)
| TinyVector (TinyVector const &r)
| TinyVector (U const *data)
| TinyVector (const_pointer data, ReverseCopyTag)
| TinyVector (TinyVectorBase< U, SIZE, DATA, DERIVED > const &r)
Public Member Functions inherited from TinyVectorBase< VALUETYPE, SIZE, VALUETYPE[SIZE], TinyVector< VALUETYPE, SIZE > >
bool | all () const
bool | any () const
iterator | begin ()
const_iterator | begin () const
const_iterator | cbegin () const
const_iterator | cend () const
iterator | end ()
const_iterator | end () const
void | init (Iterator i, Iterator end)
void | init (value_type initial)
NormType | magnitude () const
VALUETYPE const & | maximum () const
VALUETYPE const & | minimum () const
DERIVED & | operator%= (TinyVectorBase< T1, SIZE, VALUETYPE, TinyVector< VALUETYPE, SIZE > > const &r)
DERIVED & | operator*= (TinyVectorBase< T1, SIZE, VALUETYPE, TinyVector< VALUETYPE, SIZE > > const &r)
DERIVED & | operator*= (double r)
DERIVED & | operator+= (TinyVectorBase< T1, SIZE, VALUETYPE, TinyVector< VALUETYPE, SIZE > > const &r)
DERIVED & | operator+= (double r)
DERIVED & | operator-= (TinyVectorBase< T1, SIZE, VALUETYPE, TinyVector< VALUETYPE, SIZE > > const &r)
DERIVED & | operator-= (double r)
DERIVED & | operator/= (TinyVectorBase< T1, SIZE, VALUETYPE, TinyVector< VALUETYPE, SIZE > > const &r)
DERIVED & | operator/= (double r)
reference | operator[] (difference_type i)
const_reference | operator[] (difference_type i) const
size_type | size () const
SquaredNormType | squaredMagnitude () const
TinyVectorView< VALUETYPE, TO-FROM > | subarray () const

## Additional Inherited Members
Static Public Member Functions inherited from TinyVectorBase< VALUETYPE, SIZE, VALUETYPE[SIZE], TinyVector< VALUETYPE, SIZE > >
static TinyVector< VALUETYPE, SIZE > | linearSequence (VALUETYPE start=VALUETYPE(), VALUETYPE step=VALUETYPE(1))
| Factory function for a linear sequence. More...
static TinyVector< VALUETYPE, SIZE > | unitVector (int k)
| Factory function for a unit vector for dimension k.

## Detailed Description

### template<class T, unsigned int RED_IDX, unsigned int GREEN_IDX, unsigned int BLUE_IDX>
class vigra::RGBValue< T, RED_IDX, GREEN_IDX, BLUE_IDX >

Class for a single RGB value.

This class contains three values (of the specified type) that represent red, green, and blue color channels. By means of the template parameters `RED_IDX, GREEN_IDX, BLUE_IDX`, the indices 0, 1, 2 can be assigned to the three colors arbitrarily, so that, for example, a BGR type can be created as

typedef RGBValue<unsigned char, 2,1,0> BGRValue;

The standard order red=0, green=1, blue=2 is the default. There are three possibilities to access the color values: accessor functions (red(), green(), blue()), index operator (operator[](dx), where the `rgb[RED_IDX]` returns red etc.) and iterator (STL-compatible random access iterator that references the three colors in turn). The latter two methods, together with the necessary embedded typedefs, ensure compatibility of a RGBValue with a STL vector.

Arithmetic operations are defined as component-wise applications of these operations. Addition, subtraction, and multiplication of two RGBValues (+=, -=, *=, +, -, *, unary -), multiplication and division of an RGBValue with a double, and NumericTraits/PromoteTraits are defined, so that RGBValue fulfills the requirements of a Linear Algebra.

A number of accessors are provided that support access to RGBValues as a whole, to a selected color component, or to the luminance value.

#include <vigra/rgbvalue.hxx>
Namespace: vigra

Examples:
  graph_agglomerative_clustering.cxx, invert.cxx, invert_explicitly.cxx, invert_tutorial.cxx, palette.cxx, resize.cxx, and smooth_explicitly.cxx.

## Member Typedef Documentation

typedef Base::value_type value_type

STL-compatible definition of valuetype

typedef Base::iterator iterator

STL-compatible definition of iterator

typedef Base::const_iterator const_iterator

STL-compatible definition of const iterator

typedef Base::SquaredNormType SquaredNormType

squared norm type (result of squaredManitude())

typedef Base::NormType NormType

norm type (result of magnitude())

## Member Enumeration Documentation

anonymous enum

Color index positions

## Constructor & Destructor Documentation

RGBValue | ( | value_type | first,
|  | value_type | second,
|  | value_type | third
| ) |  |

Construct from explicit color values. first, second, third are written in this order, irrespective of how the color indices are specified.

RGBValue | ( | value_type | gray | ) |

Construct gray value.

RGBValue | ( | const_pointer | i | ) |
| explicit

Copy from raw memory. The order is preserved, irrespective of how the color indices are specified.

RGBValue | ( | const_pointer | i,
|  | ReverseCopyTag | reverse
| ) |  |

Construct by reverse copying from raw memory.

RGBValue | ( |  | ) |

Default constructor (sets all components to 0)

RGBValue | ( | RGBValue< U, R, G, B > const & | r | ) |

Copy constructor.

RGBValue | ( | TinyVector< value_type, 3 > const & | r | ) |

construct from TinyVector

## Member Function Documentation

RGBValue& operator= | ( | RGBValue< U, R, G, B > const & | r | ) |

Copy assignment.

RGBValue& operator= | ( | TinyVector< value_type, 3 > const & | r | ) |

assign TinyVector.

RGBValue operator- | ( |  | ) | const

Unary negation (construct RGBValue with negative values)

value_type& red | ( |  | ) |

Access red component.

value_type& green | ( |  | ) |

Access green component.

value_type& blue | ( |  | ) |

Access blue component.

value_type const& red | ( |  | ) | const

Get red component.

value_type const& green | ( |  | ) | const

Get green component.

value_type const& blue | ( |  | ) | const

Get blue component.

value_type luminance | ( |  | ) | const

Calculate luminance.

NormType magnitude | ( |  | ) | const

Calculate magnitude.

SquaredNormType squaredMagnitude | ( |  | ) | const

Calculate squared magnitude.

void setRed | ( | V | value | ) |

Set red component. The type `V` of the passed in `value` is automatically converted to `VALUETYPE`.

void setGreen | ( | V | value | ) |

Set green component.The type `V` of the passed in `value` is automatically converted to `VALUETYPE`.

void setBlue | ( | V | value | ) |

Set blue component.The type `V` of the passed in `value` is automatically converted to `VALUETYPE`.

The documentation for this class was generated from the following files:

- vigra/accessor.hxx
- vigra/rgbvalue.hxx

© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) Heidelberg Collaboratory for Image Processing, University of Heidelberg, Germany | html generated using doxygen and Python vigra 1.11.1 (Fri May 19 2017)