public Color3(LabColor color)
{
this.A = color.L;
this.B = color.A;
this.C = color.B;
this.Count = 1;
}
public static double diff(Color color1, Color color2)
{
LabColor lab1 = LabColorTransform.RgbToLab(color1);
LabColor lab2 = LabColorTransform.RgbToLab(color2);
return(Math.Sqrt((lab2.L - lab1.L) * (lab2.L - lab1.L) + (lab2.A - lab1.A) * (lab2.A - lab1.A) + (lab2.B - lab1.B) * (lab2.B - lab1.B)));
}
public int AddColor(Color color)
{
int rgb = (color.ToArgb() & 0xffffff);
LabColor lab = ColorTransform.RgbToLab(color);
using (SqlConnection conn = this.GetConnection())
{
SqlCommand cmd = new SqlCommand("UP_ADD_COLOR", conn);
cmd.CommandType = System.Data.CommandType.StoredProcedure;
cmd.Parameters.Add("@rgb", System.Data.SqlDbType.Int).Value = rgb;
cmd.Parameters.Add("@l", System.Data.SqlDbType.Float).Value = Math.Round(lab.L, 6);
cmd.Parameters.Add("@a", System.Data.SqlDbType.Float).Value = Math.Round(lab.A, 6);
cmd.Parameters.Add("@b", System.Data.SqlDbType.Float).Value = Math.Round(lab.B, 6);
cmd.Parameters.Add("@l_hash", System.Data.SqlDbType.Int).Value = lab.HashL;
cmd.Parameters.Add("@a_hash", System.Data.SqlDbType.Int).Value = lab.HashA;
cmd.Parameters.Add("@b_hash", System.Data.SqlDbType.Int).Value = lab.HashB;
cmd.ExecuteNonQuery();
cmd = null;
}
return(rgb);
}
public static XyzColor LabToXyz(LabColor lab)
{
double var_Y = (lab.L + 16f) / 116f;
double var_X = lab.A / 500f + var_Y;
double var_Z = var_Y - lab.B / 200f;
if (Math.Pow(var_Y, 3f) > 0.008856f)
{
var_Y = Math.Pow(var_Y, 3f);
}
else
{
var_Y = (var_Y - 16f / 116f) / 7.787f;
}
if (Math.Pow(var_X, 3f) > 0.008856f)
{
var_X = Math.Pow(var_X, 3f);
}
else
{
var_X = (var_X - 16f / 116f) / 7.787f;
}
if (Math.Pow(var_Z, 3f) > 0.008856f)
{
var_Z = Math.Pow(var_Z, 3f);
}
else
{
var_Z = (var_Z - 16f / 116f) / 7.787f;
}
return(new XyzColor(ref_X * var_X, //ref_X = 95.047 Observer= 2°, Illuminant= D65
ref_Y * var_Y, //ref_Y = 100.000
ref_Z * var_Z)); //ref_Z = 108.883
}
public double Distance(LabColor x)
{
float l = this.L - x.L;
float a = this.A - x.A;
float b = this.B - x.B;
return(Math.Sqrt((l * l) + (a * a) + (b * b)));
}
public RawImage Resample(int factor)
{
switch (factor)
{
case 2:
case 3:
case 4:
break;
default:
throw new ArgumentException("Invalid resample factor");
}
int w = this.Width / factor;
int h = this.Height / factor;
int[] dest = new int[w * h];
int p = 0;
int[] pp = new int[4];
double l;
double a;
double b;
for (int i = 0; i < h; i++)
{
int x = (i * factor) * this.Width;
for (int k = 0; k < factor; k++)
{
pp[k] = x;
x += this.Width;
}
for (int j = 0; j < w; j++)
{
int count = 0;
l = a = b = 0f;
for (int k = 0; k < factor; k++)
{
for (int m = 0; m < factor; m++)
{
LabColor lab = ColorTransform.RgbToLab(Color.FromArgb(this.Pixels[pp[k]]));
l += lab.L;
a += lab.A;
b += lab.B;
pp[k]++;
++count;
}
}
dest[p++] = ColorTransform.LabToRgb(new LabColor(
l / (double)count,
a / (double)count,
b / (double)count)).ToArgb() & 0xffffff;
}
}
return(new RawImage(w, h, dest));
}
private static ClusteringPoint ToPoint(Color[] colors)
{
ClusteringPoint cp = new ClusteringPoint(24);
int i = 0;
for (int j = 0; j < colors.Length; j++)
{
LabColor lc = ColorTransform.RgbToLab(colors[j]);
cp[i++] = lc.L;
cp[i++] = lc.A;
cp[i++] = lc.B;
if (i >= cp.Size)
{
break;
}
}
return(cp);
}
private static string ColorSearchSql(int color, ColorSearchWidth width, out LabColor lab)
{
lab = ColorTransform.RgbToLab(PaletteManager.ColorFromInt(color));
StringBuilder sb = new StringBuilder();
int w = (int)width;
sb.Append(@"SELECT c.RGB, c.L, c.A, c.B
FROM COLOR c, COLOR_INDEX_L l, COLOR_INDEX_A a, COLOR_INDEX_B b
WHERE (l.RGB = c.RGB) AND (a.RGB = c.RGB) AND (b.RGB = l.RGB)");
sb.Append("AND (l.[HASH] ");
int h = lab.HashL;
if (w > 0)
{
sb.Append("IN (");
int c = 0;
for (int i = -w; i <= w; i++)
{
if (c++ > 0)
{
sb.Append(',');
}
sb.Append((h + i).ToString());
}
sb.Append(')');
}
else
{
sb.Append("= ");
sb.Append(h.ToString());
}
sb.Append(')');
sb.Append(" AND (a.[HASH] ");
h = lab.HashA;
if (w > 0)
{
sb.Append("IN (");
int c = 0;
for (int i = -w; i <= w; i++)
{
if (c++ > 0)
{
sb.Append(',');
}
sb.Append((h + i).ToString());
}
sb.Append(')');
}
else
{
sb.Append("= ");
sb.Append(h.ToString());
}
sb.Append(')');
sb.Append(" AND (b.[HASH] ");
h = lab.HashB;
if (w > 0)
{
sb.Append("IN (");
int c = 0;
for (int i = -w; i <= w; i++)
{
if (c++ > 0)
{
sb.Append(',');
}
sb.Append((h + i).ToString());
}
sb.Append(')');
}
else
{
sb.Append("= ");
sb.Append(h.ToString());
}
sb.Append(')');
return(sb.ToString());
}
public static Color LabToRgb(LabColor lab)
{
return(LabColorTransform.LabToRgb(lab));
}
public static XyzColor LabToXyz(LabColor lab)
{
return(LabColorTransform.LabToXyz(lab));
}
public RawImage ResizeTo(int maxDimension)
{
if ((this.Width <= maxDimension) && (this.Height <= maxDimension))
{
return(this);
}
double scaleX = (double)this.Width / (double)maxDimension;
double scaleY = (double)this.Height / (double)maxDimension;
scaleX = scaleX > scaleY ? scaleX : scaleY;
int w = (int)((double)this.Width / scaleX);
int h = (int)((double)this.Height / scaleX);
scaleX = (double)this.Width / (double)(w + 1);
int[] mapX = new int[w + 1];
for (int i = 0; i <= w; i++)
{
mapX[i] = (int)(scaleX * (double)i);
}
mapX[w] = this.Width;
scaleY = (double)this.Height / (double)(h + 1);
int[] mapY = new int[h + 1];
for (int i = 0; i <= h; i++)
{
mapY[i] = (int)(scaleY * (double)i);
}
mapY[h] = this.Height;
int p = 0;
double l;
double a;
double b;
int[] dest = new int[w * h];
for (int i = 0; i < h; i++)
{
int y0 = mapY[i];
int y1 = mapY[i + 1];
for (int j = 0; j < w; j++)
{
int x0 = mapX[j];
int x1 = mapX[j + 1];
int count = 0;
l = a = b = 0f;
for (int ii = y0; ii < y1; ii++)
{
for (int jj = x0; jj < x1; jj++)
{
int c = this.Pixels[(ii * this.Width) + jj];
LabColor lab = ColorTransform.RgbToLab(Color.FromArgb(c));
l += lab.L;
a += lab.A;
b += lab.B;
++count;
}
}
if (count > 0)
{
dest[p] = ColorTransform.LabToRgb(new LabColor(
l / (double)count,
a / (double)count,
b / (double)count)).ToArgb() & 0xffffff;
}
++p;
}
}
return(new RawImage(w, h, dest));
}
public static Color LabToRgb(LabColor lab)
{
return(ColorTransform.XyzToRgb(ColorTransform.LabToXyz(lab)));
}
