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|   | RGB2XYZFunctor [Color Space Conversions] |  | 
Convert linear (raw) RGB into standardized tri-stimulus XYZ. More...
#include <vigra/colorconversions.hxx>
| Public Types | |
| typedef TinyVector< T, 3 > | argument_type | 
| typedef NumericTraits< T > ::RealPromote | component_type | 
| typedef TinyVector < component_type, 3 > | result_type | 
| typedef TinyVector < component_type, 3 > | value_type | 
| Public Member Functions | |
| result_type | operator() (argument_type const &rgb) const | 
| RGB2XYZFunctor (component_type max) | |
| RGB2XYZFunctor () | |
#include <vigra/colorconversions.hxx>
 Namespace: vigra
According to ITU-R Recommendation BT.709, the functor realizes the transformation
![\[ \begin{array}{rcl} X & = & 0.412453\enspace R / R_{max} + 0.357580\enspace G / G_{max} + 0.180423\enspace B / B_{max}\\ Y & = & 0.212671\enspace R / R_{max} + 0.715160\enspace G / G_{max} + 0.072169\enspace B / B_{max} \\ Z & = & 0.019334\enspace R / R_{max} + 0.119193\enspace G / G_{max} + 0.950227\enspace B / B_{max} \end{array} \]](form_11.png) 
By default,  . This default can be overridden in the constructor. X, Y, and Z are always positive and reach their maximum for white. The white point is obtained by transforming RGB(255, 255, 255). It corresponds to the D65 illuminant. Y represents the luminance ("brightness") of the color.
. This default can be overridden in the constructor. X, Y, and Z are always positive and reach their maximum for white. The white point is obtained by transforming RGB(255, 255, 255). It corresponds to the D65 illuminant. Y represents the luminance ("brightness") of the color.
Traits defined:
FunctorTraits::isUnaryFunctor is true (VigraTrueType) 
| typedef TinyVector<T, 3> argument_type | 
the functor's argument type
| typedef NumericTraits<T>::RealPromote component_type | 
the result's component type
| typedef TinyVector<component_type, 3> result_type | 
the functor's result type
| typedef TinyVector<component_type, 3> value_type | 
| RGB2XYZFunctor | ( | ) | 
default constructor. The maximum value for each RGB component defaults to 255.
| RGB2XYZFunctor | ( | component_type | max | ) | 
constructor
| result_type operator() | ( | argument_type const & | rgb | ) | const | 
apply the transformation
| 
© Ullrich Köthe     (ullrich.koethe@iwr.uni-heidelberg.de)  | 
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