public static double[][] TransformationMatrix(ColorSpace colorSpace, doublePoint whitePoint)
{
double[][] value = new double[3][];
value[0] = new double[3] {
colorSpace.Red.X, colorSpace.Green.X, colorSpace.Blue.X
};
value[1] = new double[3] {
colorSpace.Red.Y, colorSpace.Green.Y, colorSpace.Blue.Y
};
value[2] = new double[3];
for (int i = 0; i < 3; i++)
{
value[2][i] = 1 - value[1][i] - value[0][i];
}
double[][] WPvector = new double[3][];
WPvector[0] = new double[1] {
whitePoint.X / whitePoint.Y
};
WPvector[1] = new double[1] {
1
};
WPvector[2] = new double[1] {
(1 - whitePoint.X - whitePoint.Y) / whitePoint.Y
};
double[][] result = MatrixCalculations.MatrixProduct((MatrixCalculations.MatrixInverse(value)), WPvector);
double[][] temp = MatrixCalculations.MatrixCreate(3, 3);
for (int i = 0; i < 3; i++)
{
temp[i][i] = result[i][0];
}
result = MatrixCalculations.MatrixProduct(value, temp);
return(result);
}
public ColorSpace(doublePoint red, doublePoint green, doublePoint blue, double gamma, string illuminnant)
{
Red = red;
Green = green;
Blue = blue;
this.Gamma = gamma;
this.illuminnant = illuminnant;
}
public static bool ToLAB(ref GlobalObjects GObjects, ColorSpace colorSpace, doublePoint whitePoint)
{
if (GObjects.MainPicture == null)
{
return(false);
}
GObjects.Chanel1 = new DirectBitmap(GObjects.MainPicture.Width, GObjects.MainPicture.Height);
GObjects.Chanel2 = new DirectBitmap(GObjects.MainPicture.Width, GObjects.MainPicture.Height);
GObjects.Chanel3 = new DirectBitmap(GObjects.MainPicture.Width, GObjects.MainPicture.Height);
double[][] matrix = TransformationMatrix(colorSpace, whitePoint);
double[][] WPvector = new double[][] { new double[] { whitePoint.X / whitePoint.Y }, new double[] { 1 }, new double[] { (1 - whitePoint.X - whitePoint.Y) / whitePoint.Y } };
for (int i = 0; i < GObjects.MainPicture.Height; i++)
{
for (int j = 0; j < GObjects.MainPicture.Width; j++)
{
double R = Math.Pow(GObjects.MainPicture.GetPixel(j, i).R / 255.0, colorSpace.Gamma);
double G = Math.Pow(GObjects.MainPicture.GetPixel(j, i).G / 255.0, colorSpace.Gamma);
double B = Math.Pow(GObjects.MainPicture.GetPixel(j, i).B / 255.0, colorSpace.Gamma);
double[][] RGBvector = new double[][] { new double[] { R }, new double[] { G }, new double[] { B } };
double[][] XYZvector = MatrixCalculations.MatrixProduct(matrix, RGBvector);
var Values = VectorFunction(XYZvector[0][0] / WPvector[0][0], XYZvector[1][0] / WPvector[1][0], XYZvector[2][0] / WPvector[2][0]);
int Lvalue = Convert.ToInt32(116 * Values.fy - 16);
int Avalue = Convert.ToInt32(500 * (Values.fx - Values.fy));
int Bvalue = Convert.ToInt32(200 * (Values.fy - Values.fz));
GObjects.Chanel1.SetPixel(j, i, Color.FromArgb(Math.Max(Math.Min(255, Lvalue), 0), Math.Max(Math.Min(255, Lvalue), 0), Math.Max(Math.Min(255, Lvalue), 0)));
GObjects.Chanel2.SetPixel(j, i, Color.FromArgb(Math.Max(0, Math.Min(255, 127 + Avalue)), Math.Max(0, Math.Min(255, 127 - Avalue)), 127));
GObjects.Chanel3.SetPixel(j, i, Color.FromArgb(Math.Max(0, Math.Min(255, 127 + Bvalue)), 127, Math.Max(0, Math.Min(255, 127 - Bvalue))));
}
}
return(true);
}