public DNGColorSpec(double[] colorMatrix1, double[] colorMatrix2,
IFDDNGCalibrationIlluminant.Illuminant illuminant1, IFDDNGCalibrationIlluminant.Illuminant illuminant2, float[] whiteBalance)
{
fChannels = 3;
fTemperature1 = ConvertIlluminantToTemperature(illuminant1);
fTemperature2 = ConvertIlluminantToTemperature(illuminant2);
if (colorMatrix1 == null)
{
fColorMatrix1 = DNGMatrix.Identity(fChannels); //best choice if nothing is given...
}
else
{
fColorMatrix1 = new DNGMatrix3x3(colorMatrix1);
}
if (colorMatrix2 == null)
{
fColorMatrix2 = new DNGMatrix();
}
else
{
fColorMatrix2 = new DNGMatrix3x3(colorMatrix2);
}
fForwardMatrix1 = new DNGMatrix();
fForwardMatrix2 = new DNGMatrix();
fReductionMatrix1 = new DNGMatrix();
fReductionMatrix2 = new DNGMatrix();
fCameraCalibration1 = DNGMatrix.Identity(fChannels);
fCameraCalibration2 = DNGMatrix.Identity(fChannels);
fAnalogBalance = DNGMatrix.Identity(fChannels);
fForwardMatrix1 = NormalizeForwardMatrix(fForwardMatrix1);
fColorMatrix1 = fAnalogBalance * fCameraCalibration1 * fColorMatrix1;
if (fColorMatrix2.IsEmpty() ||
fTemperature1 <= 0.0 ||
fTemperature2 <= 0.0 ||
fTemperature1 == fTemperature2)
{
fTemperature1 = 5000.0;
fTemperature2 = 5000.0;
fColorMatrix2 = fColorMatrix1;
fForwardMatrix2 = fForwardMatrix1;
fReductionMatrix2 = fReductionMatrix1;
fCameraCalibration2 = fCameraCalibration1;
}
else
{
fForwardMatrix2 = NormalizeForwardMatrix(fForwardMatrix2);
fColorMatrix2 = fAnalogBalance * fCameraCalibration2 * fColorMatrix2;
// Swap values if temperatures are out of order.
if (fTemperature1 > fTemperature2)
{
double temp = fTemperature1;
fTemperature1 = fTemperature2;
fTemperature2 = temp;
DNGMatrix T = fColorMatrix1;
fColorMatrix1 = fColorMatrix2;
fColorMatrix2 = T;
T = fForwardMatrix1;
fForwardMatrix1 = fForwardMatrix2;
fForwardMatrix2 = T;
T = fReductionMatrix1;
fReductionMatrix1 = fReductionMatrix2;
fReductionMatrix2 = T;
T = fCameraCalibration1;
fCameraCalibration1 = fCameraCalibration2;
fCameraCalibration2 = T;
}
}
DNGxyCoord white;
DNGVector vec = new DNGVector((uint)whiteBalance.Length);
for (uint c = 0; c < whiteBalance.Length; c++)
{
//white point is given as a multiplicatice factor
//actual white point is hence 1/value
vec[c] = 1.0f / whiteBalance[c];
}
double unify = 1.0 / vec.MaxEntry();
vec = unify * vec;
white = NeutralToXY(vec);
WhiteXY = white;
}
private double ConvertIlluminantToTemperature(IFDDNGCalibrationIlluminant.Illuminant illuminant)
{
switch (illuminant)
{
case IFDDNGCalibrationIlluminant.Illuminant.Unknown:
return(0.0);
case IFDDNGCalibrationIlluminant.Illuminant.Daylight:
return(5500.0);
case IFDDNGCalibrationIlluminant.Illuminant.Fluorescent:
return((3800.0 + 4500.0) * 0.5);
case IFDDNGCalibrationIlluminant.Illuminant.Tungsten:
return(2850.0);
case IFDDNGCalibrationIlluminant.Illuminant.Flash:
return(5500.0);
case IFDDNGCalibrationIlluminant.Illuminant.FineWeather:
return(5500.0);
case IFDDNGCalibrationIlluminant.Illuminant.CloudyWeather:
return(6500.0);
case IFDDNGCalibrationIlluminant.Illuminant.Shade:
return(7500.0);
case IFDDNGCalibrationIlluminant.Illuminant.DaylightFluorescent:
return((5700.0 + 7100.0) * 0.5);
case IFDDNGCalibrationIlluminant.Illuminant.DayWhiteFluorescent:
return((4600.0 + 5500.0) * 0.5);
case IFDDNGCalibrationIlluminant.Illuminant.CoolWhiteFluorescent:
return((3800.0 + 4500.0) * 0.5);
case IFDDNGCalibrationIlluminant.Illuminant.WhiteFluorescent:
return((3250.0 + 3800.0) * 0.5);
case IFDDNGCalibrationIlluminant.Illuminant.WarmWhiteFluorescent:
return((2600.0 + 3250.0) * 0.5);
case IFDDNGCalibrationIlluminant.Illuminant.StandardLightA:
return(2850.0);
case IFDDNGCalibrationIlluminant.Illuminant.StandardLightB:
return(5500.0);
case IFDDNGCalibrationIlluminant.Illuminant.StandardLightC:
return(6500.0);
case IFDDNGCalibrationIlluminant.Illuminant.D55:
return(5500.0);
case IFDDNGCalibrationIlluminant.Illuminant.D65:
return(6500.0);
case IFDDNGCalibrationIlluminant.Illuminant.D75:
return(7500.0);
case IFDDNGCalibrationIlluminant.Illuminant.D50:
return(5000.0);
case IFDDNGCalibrationIlluminant.Illuminant.ISOStudioTungsten:
return(3200.0);
case IFDDNGCalibrationIlluminant.Illuminant.OtherLightSource:
return(0.0);
default:
return(0.0);
}
}
