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Class for a single RGB value. More...
#include <vigra/rgbvalue.hxx>
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 |
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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 |
Additional Inherited Members | |
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static TinyVector< VALUETYPE, SIZE > | linearSequence (VALUETYPE start=VALUETYPE(), VALUETYPE step=VALUETYPE(1)) |
Factory function for a linear sequence. | |
static TinyVector< VALUETYPE, SIZE > | unitVector (int k) |
Factory function for a unit vector for dimension k. | |
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
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
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())
anonymous enum |
Color index positions
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.
|
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
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
.
© Ullrich Köthe (ullrich.koethe@iwr.uni-heidelberg.de) |