public void HowToComputeColorFromCCT()
{
double temperature = 3000; // in K
xyChromaticity chromaticity = CCTConverter.GetChromaticityOfCCT(temperature);
// asserts
Assert.Equal(0.43657898148148144, chromaticity.x, DoubleComparer);
Assert.Equal(0.4041745241092054, chromaticity.y, DoubleComparer);
IColorConverter <xyChromaticity, RGBColor> converter = new ConverterBuilder().Fromxy(Illuminants.D65).ToRGB(RGBWorkingSpaces.sRGB).Build();
RGBColor color = converter.Convert(chromaticity);
// asserts
Assert.Equal(1.282323002024544, color.R, DoubleComparer);
Assert.Equal(0.92870160729369322, color.G, DoubleComparer);
Assert.Equal(0.55886769485605214, color.B, DoubleComparer);
color = color.NormalizeIntensity();
// asserts
Assert.Equal(1, color.R, DoubleComparer);
Assert.Equal(0.72423375844264681, color.G, DoubleComparer);
Assert.Equal(0.4358244326692311, color.B, DoubleComparer);
color.ToRGB8Bit(out var r, out var g, out var b);
// asserts
Assert.Equal(255, r);
Assert.Equal(185, g);
Assert.Equal(111, b);
}
public void ChromaticityFromCCT(double expectedX, double expectedY, double cct)
{
// action
var chromaticity = CCTConverter.GetChromaticityOfCCT(cct);
// assert
var deltaComparer = new DoubleDeltaComparer(0.02);
Assert.Equal(chromaticity.x, expectedX, deltaComparer);
Assert.Equal(chromaticity.y, expectedY, deltaComparer);
}
public void CCTFromChromaticity(double x, double y, double expectedCCT)
{
// arrange
var chromaticity = new xyChromaticityCoordinates(x, y);
var approximation = new CCTConverter();
// action
double cct = approximation.GetCCTOfChromaticity(chromaticity);
// assert
Debug.WriteLine(string.Format("CCT {0} K (difference {1} K)", cct, Math.Abs(expectedCCT - cct)));
Assert.That(cct, Is.EqualTo(expectedCCT).Using(new DoubleDeltaComparer(66)));
}
public void ChromaticityFromCCT(double expectedX, double expectedY, double cct)
{
// arrange
var approximation = new CCTConverter();
// action
xyChromaticityCoordinates chromaticity = approximation.GetChromaticityOfCCT(cct);
// assert
var deltaComparer = new DoubleDeltaComparer(0.02);
Assert.That(chromaticity.x, Is.EqualTo(expectedX).Using(deltaComparer));
Assert.That(chromaticity.y, Is.EqualTo(expectedY).Using(deltaComparer));
}
public void CCTFromChromaticity(double x, double y, double expectedCCT)
{
// arrange
var chromaticity = new xyChromaticityCoordinates(x, y);
// action
var cct = CCTConverter.GetCCTOfChromaticity(chromaticity);
// assert
Debug.WriteLine($"CCT {cct} K (difference {Math.Abs(expectedCCT - cct)} K)");
var deltaComparer = new DoubleDeltaComparer(66);
Assert.Equal(cct, expectedCCT, deltaComparer);
}
public void HowToComputeTemperatureOfAColor()
{
RGBColor color = RGBColor.FromRGB8Bit(255, 121, 0);
IColorConverter <RGBColor, xyChromaticity> converter = new ConverterBuilder().FromRGB(RGBWorkingSpaces.sRGB).Toxy(Illuminants.D65).Build();
xyChromaticity chromaticity = converter.Convert(color); // xy [x=0.55, y=0.4]
// asserts
Assert.Equal(0.55117772083302841, chromaticity.x, DoubleComparer);
Assert.Equal(0.40053533933847751, chromaticity.y, DoubleComparer);
double temperature = CCTConverter.GetCCTOfChromaticity(chromaticity); // 1293 K
// asserts
Assert.Equal(1293.0206041090441, temperature, DoubleComparer);
}
public void ChromaticityFromCCT(double expectedX, double expectedY, double cct)
{
// arrange
var approximation = new CCTConverter();
// action
xyChromaticityCoordinates chromaticity = approximation.GetChromaticityOfCCT(cct);
// assert
var deltaComparer = new DoubleDeltaComparer(0.02);
Assert.That(chromaticity.x, Is.EqualTo(expectedX).Using(deltaComparer));
Assert.That(chromaticity.y, Is.EqualTo(expectedY).Using(deltaComparer));
}
public void CCTFromChromaticity(double x, double y, double expectedCCT)
{
// arrange
var chromaticity = new xyChromaticityCoordinates(x, y);
var approximation = new CCTConverter();
// action
double cct = approximation.GetCCTOfChromaticity(chromaticity);
// assert
Debug.WriteLine(string.Format("CCT {0} K (difference {1} K)", cct, Math.Abs(expectedCCT - cct)));
Assert.That(cct, Is.EqualTo(expectedCCT).Using(new DoubleDeltaComparer(66)));
}
