RGB2RGBPrimeFunctor< From, To > Class Template Reference

Convert linear (raw) RGB into non-linear (gamma corrected) R'G'B'. More...

#include <vigra/colorconversions.hxx>

Public Types
typedef TinyVector< From, 3 >	argument_type

typedef NumericTraits< To > ::RealPromote	component_type

typedef TinyVector< To, 3 >	result_type

typedef TinyVector< To, 3 >	value_type

Public Member Functions
template<class V >
result_type	operator() (V const &rgb) const

	RGB2RGBPrimeFunctor ()

	RGB2RGBPrimeFunctor (component_type max)

Detailed Description

template<class From, class To = From>
class vigra::RGB2RGBPrimeFunctor< From, To >

Convert linear (raw) RGB into non-linear (gamma corrected) R'G'B'.

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

The functor realizes the transformation

$R' = R_{max} \left(\frac{R}{R_{max}} \right)^{0.45} \qquad G' = G_{max} \left(\frac{G}{G_{max}} \right)^{0.45} \qquad B' = B_{max} \left(\frac{B}{B_{max}} \right)^{0.45}$

By default, $R_{max} = G_{max} = B_{max} = 255$ . This default can be overridden in the constructor. If both source and target colors components are stored as unsigned char, a look-up-table will be used to speed up the transformation.