RGBPrime2RGBFunctor< From, To > Class Template Reference

Convert non-linear (gamma corrected) R'G'B' into non-linear (raw) RGB. 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
result_type	operator() (argument_type const &rgb) const

	RGBPrime2RGBFunctor ()

	RGBPrime2RGBFunctor (component_type max)

Detailed Description

template<class From, class To = From>
class vigra::RGBPrime2RGBFunctor< From, To >

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

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

The functor realizes the transformation

$R = R_{max} \left(\frac{R'}{R_{max}} \right)^{1/0.45} \qquad G = G_{max} \left(\frac{G'}{G_{max}} \right)^{1/0.45} \qquad B = B_{max} \left(\frac{B'}{B_{max}} \right)^{1/0.45}$

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