/
PixLABImpl.H
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/
PixLABImpl.H
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//NRT_HEADER_BEGIN
/*! @file details/PixHSVImpl.H */
// ////////////////////////////////////////////////////////////////////////
// The iLab Neuromorphic Robotics Toolkit (NRT) //
// Copyright 2010 by the University of Southern California (USC) and the //
// iLab at USC. //
// //
// iLab - University of Southern California //
// Hedco Neurociences Building, Room HNB-10 //
// Los Angeles, Ca 90089-2520 - USA //
// //
// See http://ilab.usc.edu for information about this project. //
// ////////////////////////////////////////////////////////////////////////
// This file is part of The iLab Neuromorphic Robotics Toolkit. //
// //
// The iLab Neuromorphic Robotics Toolkit is free software: you can //
// redistribute it and/or modify it under the terms of the GNU General //
// Public License as published by the Free Software Foundation, either //
// version 3 of the License, or (at your option) any later version. //
// //
// The iLab Neuromorphic Robotics Toolkit is distributed in the hope //
// that it will be useful, but WITHOUT ANY WARRANTY; without even the //
// implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
// PURPOSE. See the GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with The iLab Neuromorphic Robotics Toolkit. If not, see //
// <http://www.gnu.org/licenses/>. //
// ////////////////////////////////////////////////////////////////////////
//
// Primary maintainer for this file:
//
//NRT_HEADER_END
//// ######################################################################
template <class T>
PixLAB<T>::PixLAB() : PixelBase<T, 3, PixLAB>()
{ }
// ######################################################################
template <class T>
template <typename T1>
PixLAB<T>::PixLAB(T1 value) :
PixelBase<T, 3, PixLAB>(value)
{ }
// ######################################################################
template <class T>
PixLAB<T>::PixLAB(T l, T a, T b)
{
this->channels[0] = l;
this->channels[1] = a;
this->channels[2] = b;
}
// ######################################################################
template<class T>
template<class T2>
PixLAB<T>::PixLAB(PixLAB<T2> const& other) :
PixelBase<T, 3, PixLAB>(other)
{ }
// ######################################################################
template <class T>
template <class lType, class aType, class bType>
PixLAB<T>::PixLAB(lType l, aType a, bType b)
{
this->channels[0] = clamped_convert<T>(l);
this->channels[1] = clamped_convert<T>(a);
this->channels[2] = clamped_convert<T>(b);
}
// ######################################################################
template <class T>
T PixLAB<T>::l() const
{ return this->channels[0]; }
// ######################################################################
template <class T>
T PixLAB<T>::a() const
{ return this->channels[1]; }
// ######################################################################
template <class T>
T PixLAB<T>::b() const
{ return this->channels[2]; }
// ######################################################################
template <class T>
void PixLAB<T>::setL(T value)
{ this->channels[0] = value; }
// ######################################################################
template <class T>
void PixLAB<T>::setA(T value)
{ this->channels[1] = value; }
// ######################################################################
template <class T>
void PixLAB<T>::setB(T value)
{ this->channels[2] = value; }
// ######################################################################
template <class T>
template<class T2>
void PixLAB<T>::setL(T2 value)
{ this->channels[0] = clamped_convert<T>(value); }
// ######################################################################
template <class T>
template<class T2>
void PixLAB<T>::setA(T2 value)
{ this->channels[1] = clamped_convert<T>(value); }
// ######################################################################
template <class T>
template<class T2>
void PixLAB<T>::setB(T2 value)
{ this->channels[2] = clamped_convert<T>(value); }
// ######################################################################
template <class T>
PixRGB<T> PixLAB<T>::toRGB() const
{
double Xn = 095.0456;
double Yn = 100.0000;
double Zn = 108.8754;
//printf("toRGB(l=%f, a=%f, b=%f)\n", l(), a(), b());
double var_Y = (l()+16.0)/116.0;
double var_X = a()/500.0 + var_Y;
double var_Z = var_Y - b()/200.0;
if (pow(var_Y, 3.0) > 0.008856)
var_Y = pow(var_Y, 3.0);
else
var_Y = (var_Y-16.0/116.0) / 7.787;
if (pow(var_X, 3.0) > 0.008856)
var_X = pow(var_X, 3.0);
else
var_X = (var_X - 16.0/116.0)/7.787;
if (pow(var_Z, 3.0) > 0.008856)
var_Z = pow(var_Z, 3.0);
else
var_Z = (var_Z-16.0/116.0)/7.787;
double X = Xn * var_X;
double Y = Yn * var_Y;
double Z = Zn * var_Z;
var_X = X / 100.0;
var_Y = Y / 100.0;
var_Z = Z / 100.0;
double var_R = 3.240479*var_X - 1.537150*var_Y - 0.498535*var_Z;
double var_G = -0.969256*var_X + 1.875991*var_Y + 0.041556*var_Z;
double var_B = 0.055648*var_X - 0.204043*var_Y + 1.057311*var_Z;
if ( var_R > 0.0031308 )
var_R = 1.055 * pow(var_R,1.0/2.4) - 0.055;
else
var_R = 12.92 * var_R;
if ( var_G > 0.0031308 )
var_G = 1.055 * pow(var_G,1.0/2.4) - 0.055;
else
var_G = 12.92 * var_G;
if ( var_B > 0.0031308 )
var_B = 1.055 * pow(var_B,1.0/2.4) - 0.055;
else
var_B = 12.92 * var_B;
double R = var_R * 255.0;
double G = var_G * 255.0;
double B = var_B * 255.0;
//printf("%f, %f, %f\n", R, G, B);
return PixRGB<T>(R, G, B);
}
// ######################################################################
template <class T>
PixLAB<T> PixLAB<T>::fromRGB(PixRGB<T> const & other)
{
// from opencv: http://bit.ly/pp5ZJm
double fX, fY, fZ, L, a, b;
double Xn = 0.950456;
double Yn = 1.000000;
double Zn = 1.088754;
double X = 0.412453*other.r() + 0.357580*other.g() + 0.180423*other.b();
double Y = 0.212671*other.r() + 0.715160*other.g() + 0.072169*other.b();
double Z = 0.019334*other.r() + 0.119193*other.g() + 0.950227*other.b();
X = X/(255.0*Xn);
Y = Y/(255.0*Yn);
Z = Z/(255.0*Zn);
if (Y > 0.008856) {
fY = pow(Y, 1.0/3.0);
L = 116.0*fY - 16.0 + 0.5;
} else {
fY = 7.787*Y + 16.0/116.0;
L = 903.3*Y + 0.5;
}
if (X > 0.008856)
fX = pow(X, 1.0/3.0);
else
fX = 7.787*X + 16.0/116.0;
if (Z > 0.008856)
fZ = pow(Z, 1.0/3.0);
else
fZ = 7.787*Z + 16.0/116.0;
a = 500.0 * (fX - fY) + 0.5;
b = 200.0 * (fY - fZ) + 0.5;
// printf("%f, %f, %f\n", L, a, b);
return PixLAB<T>(L, a, b);
}