//this is the core of the algorithm. the output image is computed in the HCL color space
//using the gray scale visible image for Luminance and thermal image for Hue
private unsafe void FuseLuminances()
{
var converter = new ColourfulConverter {
WhitePoint = Illuminants.D65
};
var data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.WriteOnly, PixelFormat.Format32bppRgb);
int *dst = (int *)data.Scan0;
for (int i = 0; i < visibles.Length; i++)
{
double luminance = visibles[i] * 100; //0..100
double hue = Math.Min(1, thermals[i] * hueGain);
hue = 300 - (int)(hue * 300); //0..300
//compose HCL color
var hclColor = new LChabColor(luminance, chroma, hue);
//convert to RGB and put in bitmap
Color color = converter.ToRGB(hclColor);
* dst++ = (color.R << 16) | (color.G << 8) | color.B;
}
bitmap.UnlockBits(data);
}
public void Equals_Same()
{
var first = new LChabColor(l: 10, c: 20.5, h: 45.445);
var second = new LChabColor(l: 10, c: 20.5, h: 45.445);
CustomAssert.EqualsWithHashCode(first, second);
}
public void Equals_Different()
{
var first = new LChabColor(l: 11, c: 20.5, h: 45.445);
var second = new LChabColor(l: 10, c: 20.5, h: 45.445);
CustomAssert.NotEqualsWithHashCode(first, second);
}
public void LChabColor()
{
var first = new LChabColor(10, 20.5, 45.445);
var second = new LChabColor(10, 20.5, 45.445);
Assert.Equal(first, (object)second);
}
public void VectorCtor()
{
var first = new LChabColor(l: 10, c: 20.5, h: 45.445);
var vector = new[] { 10, 20.5, 45.445 };
var second = new LChabColor(vector);
CustomAssert.EqualsWithHashCode(first, second);
Assert.Equal(vector, second.Vector);
}
public void FromSaturationCtor()
{
var first = new LChabColor(l: 10, c: 3, h: 20);
const double saturation = 30d;
var second = LChabColor.FromSaturation(lightness: 10, hue: 20, saturation);
CustomAssert.EqualsWithHashCode(first, second);
Assert.Equal(saturation, second.Saturation);
}
public void Dctor()
{
const double l1 = 10;
const double c1 = 20.5;
const double h1 = 45.445;
var(l2, c2, h2) = new LChabColor(l1, c1, h1);
Assert.Equal(l1, l2);
Assert.Equal(c1, c2);
Assert.Equal(h1, h2);
}
public LChabColor ToLChab(XYZColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
LabColor labColor = ToLab(color);
LChabColor result = ToLChab(labColor);
return(result);
}
public HunterLabColor ToHunterLab(LChabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
XYZColor xyzColor = ToXYZ(color);
HunterLabColor result = ToHunterLab(xyzColor);
return(result);
}
public void LChabToRgb()
{
var inputLChab = new LChabColor(53.9, 81.52, 30.2);
var rgbWorkingSpace = RGBWorkingSpaces.sRGB;
var lChabToRgb = new ConverterBuilder().FromLChab(Illuminants.D50).ToRGB(rgbWorkingSpace).Build();
var outputRgb = lChabToRgb.Convert(inputLChab); // RGB [R=0.94, G=0.2, B=0.25]
Assert.Equal(0.9370373270715214, outputRgb.R);
Assert.Equal(0.2000445268236402, outputRgb.G);
Assert.Equal(0.2509818153127169, outputRgb.B);
}
public xyYColor ToxyY(LChabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
XYZColor xyzColor = ToXYZ(color);
xyYColor result = ToxyY(xyzColor);
return(result);
}
public LinearRGBColor ToLinearRGB(LChabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
XYZColor xyzColor = ToXYZ(color);
LinearRGBColor result = ToLinearRGB(xyzColor);
return(result);
}
public void Convert_LCHab_to_Lab(double l, double c, double h, double l2, double a, double b)
{
// arrange
var input = new LChabColor(l, c, h);
// act
LabColor output = Converter.ToLab(input);
// assert
Assert.That(output.L, Is.EqualTo(l2).Using(DoubleComparer));
Assert.That(output.a, Is.EqualTo(a).Using(DoubleComparer));
Assert.That(output.b, Is.EqualTo(b).Using(DoubleComparer));
}
public void Convert_LCHab_to_Lab(double l, double c, double h, double l2, double a, double b)
{
// arrange
var input = new LChabColor(l, c, h);
// act
var output = Converter.ToLab(input);
// assert
Assert.Equal(output.L, l2, DoubleComparer);
Assert.Equal(output.a, a, DoubleComparer);
Assert.Equal(output.b, b, DoubleComparer);
}
public void Convert_LCHab_to_Lab(double l, double c, double h, double l2, double a, double b)
{
// arrange
var input = new LChabColor(l, c, h);
// act
LabColor output = Converter.ToLab(input);
// assert
Assert.That(output.L, Is.EqualTo(l2).Using(DoubleComparer));
Assert.That(output.a, Is.EqualTo(a).Using(DoubleComparer));
Assert.That(output.b, Is.EqualTo(b).Using(DoubleComparer));
}
public void Convert_Lab_to_LCHab(double l, double a, double b, double l2, double c, double h)
{
// arrange
var input = new LabColor(l, a, b);
// act
LChabColor output = Converter.ToLChab(input);
// assert
Assert.That(output.L, Is.EqualTo(l2).Using(DoubleComparer));
Assert.That(output.C, Is.EqualTo(c).Using(DoubleComparer));
Assert.That(output.h, Is.EqualTo(h).Using(DoubleComparer));
}
public void SamplesLChab()
{
// red
var c1 = new LChabColor(53.9, 81.52, 30.2);
// white
var c2 = new LChabColor(100, 0, 0);
// gray
var c3 = new LChabColor(53.39, 0, 0);
// black
var c4 = new LChabColor(0, 0, 0);
}
public void Adapt_LChab_D50_To_D65(double l1, double c1, double h1, double l2, double c2, double h2)
{
// arrange
var input = new LChabColor(l1, c1, h1, Illuminants.D50);
var expectedOutput = new LChabColor(l2, c2, h2);
var converter = new ColourfulConverter { TargetLabWhitePoint = Illuminants.D65 };
// action
LChabColor output = converter.Adapt(input);
// assert
Assert.That(output.L, Is.EqualTo(expectedOutput.L).Using(DoubleRoundingComparer));
Assert.That(output.C, Is.EqualTo(expectedOutput.C).Using(DoubleRoundingComparer));
Assert.That(output.h, Is.EqualTo(expectedOutput.h).Using(DoubleRoundingComparer));
}
public Color Saturate(double amount = 1)
{
using (ColorToolExtensions.BorrowColourfulConverter(out var conv))
{
LChabColor lch = conv.ToLChab(_rgb);
double C = lch.C + (LabConsts.Kn * amount);
if (C < 0)
{
C = 0;
}
LChabColor lch2 = new LChabColor(lch.L, C, lch.h);
RGBColor rgb = conv.ToRGB(lch2);
return(Alpha(rgb, Alpha(), true));
}
}
public XYZColor ToXYZ(LChabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
// conversion to Lab
var labConverter = new LChabToLabConverter();
LabColor labColor = labConverter.Convert(color);
// conversion to XYZ (incl. adaptation)
XYZColor result = ToXYZ(labColor);
return(result);
}
public LChabColor ToLChab(LabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
// adaptation to target lab white point (LabWhitePoint)
LabColor adapted = IsChromaticAdaptationPerformed ? Adapt(color) : color;
// conversion (perserving white point)
var converter = new LabToLChabConverter();
LChabColor result = converter.Convert(adapted);
return(result);
}
public void Adapt_LChab_D50_To_D65(double l1, double c1, double h1, double l2, double c2, double h2)
{
// arrange
var input = new LChabColor(l1, c1, h1, Illuminants.D50);
var expectedOutput = new LChabColor(l2, c2, h2);
var converter = new ColourfulConverter {
TargetLabWhitePoint = Illuminants.D65
};
// action
LChabColor output = converter.Adapt(input);
// assert
Assert.That(output.L, Is.EqualTo(expectedOutput.L).Using(DoubleRoundingComparer));
Assert.That(output.C, Is.EqualTo(expectedOutput.C).Using(DoubleRoundingComparer));
Assert.That(output.h, Is.EqualTo(expectedOutput.h).Using(DoubleRoundingComparer));
}
public LChabColor ToLChab <T>(T color) where T : IColorVector
{
if (color == null)
{
throw new ArgumentNullException("color");
}
LChabColor converted = color as LChabColor;
if (converted != null)
{
return(converted);
}
else
{
dynamic source = color;
return(ToLChab(source));
}
}
public LabColor ToLab(LChabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
// conversion (perserving white point)
var converter = new LChabToLabConverter();
LabColor unadapted = converter.Convert(color);
if (!IsChromaticAdaptationPerformed)
{
return(unadapted);
}
// adaptation to target lab white point (LabWhitePoint)
LabColor adapted = Adapt(unadapted);
return(adapted);
}
/// <summary>
/// Adapts LChab color from the source white point to white point set in <see cref="TargetLabWhitePoint"/>.
/// </summary>
public LChabColor Adapt(LChabColor color)
{
if (color == null)
{
throw new ArgumentNullException("color");
}
if (!IsChromaticAdaptationPerformed)
{
throw new InvalidOperationException("Cannot perform chromatic adaptation, provide chromatic adaptation method and white point.");
}
if (color.WhitePoint.Equals(TargetLabWhitePoint))
{
return(color);
}
LabColor labColor = ToLab(color);
LChabColor result = ToLChab(labColor);
return(result);
}
public void ToString_Simple()
{
var color = new LChabColor(l: 10, c: 20.5, h: 45.445);
Assert.Equal("LChab [L=10, C=20.5, h=45.45]", color.ToString());
}
public void LChabColor()
{
var color = new LChabColor(10, 20.5, 45.445);
Assert.AreEqual("LChab [L=10, C=20.5, h=45.45]", color.ToString());
}
/// <summary>
/// Adapts LChab color from the source white point to white point set in <see cref="TargetLabWhitePoint"/>.
/// </summary>
public LChabColor Adapt(LChabColor color)
{
if (color == null) throw new ArgumentNullException("color");
if (!IsChromaticAdaptationPerformed)
throw new InvalidOperationException("Cannot perform chromatic adaptation, provide chromatic adaptation method and white point.");
if (color.WhitePoint.Equals(TargetLabWhitePoint))
return color;
LabColor labColor = ToLab(color);
LChabColor result = ToLChab(labColor);
return result;
}
public void LChabColor()
{
var color = new LChabColor(10, 20.5, 45.445);
Assert.Equal("LChab [L=10, C=20.5, h=45.45]", color.ToString());
}