private static Bitmap CropColor(Bitmap bmp)
{
var forbiddenColors = new List <Color>
{
Color.FromArgb(37, 24, 15)
};
Bitmap newBitmap = new Bitmap(bmp.Width, bmp.Height);
for (var x = 0; x < bmp.Width; x++)
{
for (var y = 0; y < bmp.Height; y++)
{
var firstColor = bmp.GetPixel(x, y);
var firstLab = CIELab.FromRGB(firstColor);
foreach (var secondColor in forbiddenColors)
{
var secondLab = CIELab.FromRGB(secondColor);
var score = Math.Sqrt(Math.Pow(secondLab.L - firstLab.L, 2) +
Math.Pow(secondLab.a - firstLab.a, 2) +
Math.Pow(secondLab.b - firstLab.b, 2));
if (score > 0.5f)
{
newBitmap.SetPixel(x, y, firstColor);
}
}
}
}
return(newBitmap);
}
public List <double> LabToRGB(CIELab cielab)
{
var y = (cielab.L + 16) / 116;
var x = cielab.A / 500 + y;
var z = y - cielab.B / 200;
double r, g, b;
x = 0.95047 * ((x * x * x > 0.008856) ? x * x * x : (x - 16 / 116) / 7.787);
y = 1.00000 * ((y * y * y > 0.008856) ? y * y * y : (y - 16 / 116) / 7.787);
z = 1.08883 * ((z * z * z > 0.008856) ? z * z * z : (z - 16 / 116) / 7.787);
r = x * 3.2406 + y * -1.5372 + z * -0.4986;
g = x * -0.9689 + y * 1.8758 + z * 0.0415;
b = x * 0.0557 + y * -0.2040 + z * 1.0570;
r = (r > 0.0031308) ? (1.055 * Math.Pow(r, 1 / 2.4) - 0.055) : 12.92 * r;
g = (g > 0.0031308) ? (1.055 * Math.Pow(g, 1 / 2.4) - 0.055) : 12.92 * g;
b = (b > 0.0031308) ? (1.055 * Math.Pow(b, 1 / 2.4) - 0.055) : 12.92 * b;
return(new List <double>()
{
Math.Max(0, Math.Min(1, r)) * 255,
Math.Max(0, Math.Min(1, g)) * 255,
Math.Max(0, Math.Min(1, b)) * 255
});
}
public static CIELab XYZtoLab(double x, double y, double z)
{
CIELab lab = CIELab.Empty;
lab.L = 116.0 * Fxyz(y / CIEXYZ.D65.Y) - 16;
lab.A = 500.0 * (Fxyz(x / CIEXYZ.D65.X) - Fxyz(y / CIEXYZ.D65.Y));
lab.B = 200.0 * (Fxyz(y / CIEXYZ.D65.Y) - Fxyz(z / CIEXYZ.D65.Z));
return(lab);
}
/// <summary>
/// Converts CIEXYZ to CIELab.
/// </summary>
public static CIELab XYZtoLab(CIEXYZ ciexyz)
{
CIELab lab = CIELab.Empty;
double x = ciexyz.X; double y = ciexyz.Y; double z = ciexyz.Z;
lab.L = 116.0 * Fxyz(y / CIEXYZ.D65.Y) - 16;
lab.A = 500.0 * (Fxyz(x / CIEXYZ.D65.X) - Fxyz(y / CIEXYZ.D65.Y));
lab.B = 200.0 * (Fxyz(y / CIEXYZ.D65.Y) - Fxyz(z / CIEXYZ.D65.Z));
return(lab);
}
public void DesaturateTest()
{
// Arrange
CIELab lab = new CIELab {
L = 97.4, a = 62.3, b = 81.2
};
double aMax = 55, aMin = -55, bMax = 75, bMin = -75;
// Act
bool desaturated = Colorimetric.Desaturate(ref lab, aMax, aMin, bMax, bMin);
// Assert
Assert.IsTrue(desaturated);
}
public static XYZ CIELabToXYZ(CIELab Color)
{
float P = (Color.L + 16) / 116.0f;
float Xn = 0.95f;
float Yn = 1.0f;
float Zn = 1.09f;
XYZ result = new XYZ(Xn * (float)Math.Pow(P + Color.a / 500.0f, 3.0f),
Yn * (float)Math.Pow(P, 3.0f),
Zn * (float)Math.Pow(P - Color.b / 200.0f, 3.0f));
return(result);
}
public void LCh2LabTest()
{
// Arrange
CIELCh lch = new CIELCh {
L = 100.0, C = 0.0, h = 0.0
};
// Act
CIELab lab = Colorimetric.LCh2Lab(lch);
// Assert
Assert.AreEqual(100.0, lab.L);
Assert.AreEqual(0.0, lab.a);
Assert.AreEqual(0.0, lab.b);
}
public void Lab2LChTest()
{
// Arrange
CIELab lab = new CIELab {
L = 100.0, a = 0.0, b = 0.0
};
// Act
CIELCh lch = Colorimetric.Lab2LCh(lab);
// Assert
Assert.AreEqual(100.0, lch.L);
Assert.AreEqual(0.0, lch.C);
Assert.AreEqual(0.0, lch.h);
}
public void CIELab_operatorCIELChTest()
{
// Arrange
CIELab lab = new CIELab {
L = 100.0, a = 0.0, b = 0.0
};
// Act
CIELCh lch = lab;
// Assert
Assert.AreEqual(100.0, lch.L);
Assert.AreEqual(0.0, lch.C);
Assert.AreEqual(0.0, lch.h);
}
public void CIEDE2000Test()
{
// Arrange
CIELab lab1 = new CIELab {
L = 100.0, a = 0.0, b = 0.0
};
CIELab lab2 = new CIELab {
L = 87.5, a = 3.21, b = -16.7
};
// Act
var actual = DeltaE.CIEDE2000(lab1, lab2);
// Assert
}
public void CIELCh_operatorCIELabTest()
{
// Arrange
CIELCh lch = new CIELCh {
L = 100.0, C = 0.0, h = 0.0
};
// Act
CIELab lab = lch;
// Assert
Assert.AreEqual(100.0, lab.L);
Assert.AreEqual(0.0, lab.a);
Assert.AreEqual(0.0, lab.b);
}
public void LabV2EncodingTest()
{
ushort[] inWLab = new ushort[3];
for (ushort u = 0; u < ushort.MaxValue; u++)
{
inWLab[0] = inWLab[1] = inWLab[2] = u;
CIELab lab = Colorimetric.LabEncoded2FloatV2(inWLab);
ushort[] outWLab = Colorimetric.Float2LabEncodedV2(lab);
for (int i = 0; i < 3; i++)
{
Assert.AreEqual(u, outWLab[i]);
}
}
}
public void CheckPointTest()
{
// Arrange
IntPtr plugin = IntPtr.Zero;
IntPtr userData = IntPtr.Zero;
using (var context = Context.Create(plugin, userData))
using (var gbd = GamutBoundaryDescriptor.Create(context))
{
CIELab add = new CIELab {
};
for (int L = 0; L <= 100; L += 10)
{
for (int a = -128; a <= 128; a += 5)
{
for (int b = -128; b <= 128; b += 5)
{
add.L = L;
add.a = a;
add.b = b;
gbd.AddPoint(add);
}
}
}
gbd.Compute();
// Act
CIELab check = new CIELab {
};
for (int L = 10; L <= 90; L += 25)
{
for (int a = -120; a <= 120; a += 25)
{
for (int b = -120; b <= 120; b += 25)
{
check.L = L;
check.a = a;
check.b = b;
// Assert
Assert.IsTrue(gbd.CheckPoint(check));
}
}
}
}
}
public void CMCTest()
{
// Arrange
CIELab lab1 = new CIELab {
L = 100.0, a = 0.0, b = 0.0
};
CIELab lab2 = new CIELab {
L = 87.5, a = 3.21, b = -16.7
};
double l = 2.0;
double c = 1.0;
// Act
var actual = DeltaE.CMC(lab1, lab2, l, c);
// Assert
}
public void CIEXYZ_ToLabTest()
{
// Arrange
CIEXYZ whitePoint = new CIEXYZ {
X = 0.9642, Y = 1.0, Z = 0.8249
}; // D50 XYZ normalized to Y = 1.0
CIEXYZ xyz = new CIEXYZ {
X = 0.9642, Y = 1.0, Z = 0.8249
};
// Act
CIELab lab = xyz.ToLab(whitePoint);
// Assert
Assert.AreEqual(100.0, lab.L);
Assert.AreEqual(0.0, lab.a);
Assert.AreEqual(0.0, lab.b);
}
public void XYZ2LabTest()
{
// Arrange
CIEXYZ whitePoint = new CIEXYZ {
X = 0.9642, Y = 1.0, Z = 0.8249
}; // D50 XYZ normalized to Y = 1.0
CIEXYZ xyz = new CIEXYZ {
X = 0.9642, Y = 1.0, Z = 0.8249
};
// Act
CIELab lab = Colorimetric.XYZ2Lab(whitePoint, xyz);
// Assert
Assert.AreEqual(100.0, lab.L);
Assert.AreEqual(0.0, lab.a);
Assert.AreEqual(0.0, lab.b);
}
public void Lab2XYZTest()
{
// Arrange
CIEXYZ whitePoint = new CIEXYZ {
X = 0.9642, Y = 1.0, Z = 0.8249
}; // D50 XYZ normalized to Y = 1.0
CIELab lab = new CIELab {
L = 100.0, a = 0.0, b = 0.0
};
// Act
CIEXYZ xyz = Colorimetric.Lab2XYZ(whitePoint, lab);
// Assert
Assert.AreEqual(0.9642, xyz.X);
Assert.AreEqual(1.0, xyz.Y);
Assert.AreEqual(0.8249, xyz.Z);
}
public static CIELab XYZToCIELab(XYZ Color)
{
CIELab lab = new CIELab();
// from wikipedia, the only source that actually states useable values for those "constants"
float Xn = 0.95f;
float Yn = 1.0f;
float Zn = 1.09f;
float xFactor = Color.X / Xn;
float yFactor = Color.Y / Yn;
float zFactor = Color.Z / Zn;
if (yFactor > 0.008856)
{
yFactor = (float)Math.Pow(yFactor, 1.0 / 3.0);
lab.L = (float)(116 * yFactor - 16);
}
else
{
lab.L = 903.3f * yFactor;
yFactor = 7.787f * yFactor + 16.0f / 116.0f;
}
if (xFactor > 0.008856f)
{
xFactor = (float)Math.Pow(xFactor, 1.0 / 3.0);
}
else
{
xFactor = 7.787f * xFactor + 16.0f / 116.0f;
}
if (zFactor > 0.008856f)
{
zFactor = (float)Math.Pow(zFactor, 1.0 / 3.0);
}
else
{
zFactor = 7.787f * zFactor + 16.0f / 116.0f;
}
lab.a = 500.0f * (xFactor - yFactor);
lab.b = 200.0f * (yFactor - zFactor);
return(lab);
}
public void AddPointTest()
{
// Arrange
IntPtr plugin = IntPtr.Zero;
IntPtr userData = IntPtr.Zero;
CIELab lab = new CIELab {
L = 99.3, a = 12.6, b = 14.2
};
using (var context = Context.Create(plugin, userData))
using (var gbd = GamutBoundaryDescriptor.Create(context))
{
// Act
bool added = gbd.AddPoint(lab);
// Assert
Assert.IsTrue(added);
}
}
public static int ClosestColor(Color col, int type)
{
if (type == AVERAGE_COLOR)
{
int error = 196609;
int ret = -1;
for (int i = 0; i < Exist.Count; i++)
{
int rgb = Exist.ElementAt(i);
int r = (rgb & 0xff0000) / 65536;
int g = (rgb & 0xff00) / 256;
int b = (rgb & 0xff) / 1;
int R = (col.R - r);
int G = (col.G - g);
int B = (col.B - b);
int RGB = R * R + G * G + B * B;
if (error > RGB)
{
error = RGB;
ret = ExistID.ElementAt(i);
}
}
return(ret);
}
else if (type == AVERAGE_COLOR_WITH_WEIGHT)
{
double error = 100000000;
int ret = -1;
for (int i = 0; i < Exist.Count; i++)
{
int rgb = Exist.ElementAt(i);
int r = (rgb & 0xff0000) / 65536;
int g = (rgb & 0xff00) / 256;
int b = (rgb & 0xff) / 1;
double R = (col.R - r) * 0.30;
double G = (col.G - g) * 0.59;
double B = (col.B - b) * 0.11;
double er = R * R + G * G + B * B;
if (error > er)
{
error = er;
ret = ExistID.ElementAt(i);
}
}
return(ret);
}
else if (type == AVERAGE_LAB)
{
double error = 1000000000;
int ret = -1;
CIELab lab_c = ColorConverter.RGBtoLab(col.ToArgb() & 0xffffff);
for (int i = 0; i < Exist.Count; i++)
{
int rgb = Exist.ElementAt(i);
CIELab lab = ColorConverter.RGBtoLab(rgb);
double L = (lab_c.L - lab.L);
double A = (lab_c.A - lab.A);
double B = (lab_c.B - lab.B);
double er = L * L + A * A + B * B;
if (error > er)
{
error = er;
ret = ExistID.ElementAt(i);
}
}
return(ret);
}
return(-1);
}
public static RGB CIELabToRGB(CIELab Color)
{
return(XYZToRGB(CIELabToXYZ(Color)));
}
static void Main(string[] args)
{
string inputDirectory = args[0];
string inputFilelist = args[1];
string outputFile = args[2];
int resizeWidth = int.Parse(args[3]);
int resizeHeight = int.Parse(args[4]);
if (resizeWidth != resizeHeight)
{
throw new NotImplementedException();
}
// load filelist
List <string> filelist = new List <string>();
using (StreamReader reader = new StreamReader(inputFilelist))
{
while (!reader.EndOfStream)
{
filelist.Add(inputDirectory + reader.ReadLine());
}
}
ResizeExtractor extractor = new ResizeExtractor();
// compute and write the result
//const int batchSize = 1000;
using (BinaryWriter writer = new BinaryWriter(new FileStream(outputFile, FileMode.Create)))
{
writer.Write(filelist.Count); // feature count
writer.Write(resizeWidth * resizeHeight * 3); // feature dimension
for (int i = 0; i < filelist.Count; i++)
{
Bitmap inputImage = new Bitmap(filelist[i]);
Bitmap resizedImage = ResizeExtractor.ResizeImage(inputImage, resizeWidth, resizeHeight);
//writer.Write(resizeWidth * resizeHeight); // centroid count
for (int iRow = 0; iRow < resizeHeight; iRow++) // each centroid
{
for (int iCol = 0; iCol < resizeWidth; iCol++)
{
Color color = resizedImage.GetPixel(iRow, iCol);
CIELab lab = ColorTransform.ColorTransform.RGBtoLab(color.R, color.G, color.B);
//writer.Write((float)1); // weight in [0, 1]
//writer.Write((float)gaussKernel[iRow, iCol]);
//writer.Write((float)((iCol + 0.5) / resizeWidth)); // XY in [0, 1]
//writer.Write((float)((iRow + 0.5) / resizeHeight));
writer.Write((float)(lab.L / lab.lMaxValue)); // Lab in [-1, 1]
writer.Write((float)(lab.A / lab.aMaxValueAbs));
writer.Write((float)(lab.B / lab.bMaxValueAbs));
//writer.Write((float)0);
//writer.Write((float)0);
}
}
if ((i + 1) % 100 == 0)
{
Console.WriteLine("Extracted " + (i + 1) + "/" + filelist.Count + " signatures.");
}
}
}
}
/// <summary>
/// Converts CIELab to CIEXYZ.
/// </summary>
public static CIEXYZ LabtoXYZ(CIELab lab)
{
return(LabtoXYZ(lab.L, lab.A, lab.B));
}
/// <summary>
/// Converts CIELab to RGB.
/// </summary>
public static RGB LabtoRGB(CIELab lab)
{
return(XYZtoRGB(LabtoXYZ(lab)));
}
public static void Initialize(int type)
{
if (type == BLEND_COLOR)
{
for (int i = 0; i < 2; i++)
{
for (int xy = 0; xy < 256; xy++)
{
int rgb1 = LIST_RGB_COLOR[xy & 15];
int rgb2 = LIST_RGB_COLOR[xy / 16];
int r1 = (rgb1 & 0xff0000) / 65536;
int g1 = (rgb1 & 0xff00) / 256;
int b1 = (rgb1 & 0xff) / 1;
int r2 = (rgb2 & 0xff0000) / 65536;
int g2 = (rgb2 & 0xff00) / 256;
int b2 = (rgb2 & 0xff) / 1;
if (i == 0) // 75% Foreground 25% Background
{
double r = (r1 * 3 + r2) / 4.0;
double g = (g1 * 3 + g2) / 4.0;
double b = (b1 * 3 + b2) / 4.0;
r = (r > 255 ? 255 : (r < 0 ? 0 : r));
g = (g > 255 ? 255 : (g < 0 ? 0 : g));
b = (b > 255 ? 255 : (b < 0 ? 0 : b));
int rgb = (int)r * 0x10000 + (int)g * 0x100 + (int)b;
if (!Exist.Contains(rgb))
{
Exist.Add(rgb);
ExistID.Add(i * 256 + xy);
}
}
else // 50% Foreground 50% Background
{
double r = (r1 + r2) / 2.0;
double g = (g1 + g2) / 2.0;
double b = (b1 + b2) / 2.0;
//r = Math.Sqrt(r1 * r1 + r2 * r2);
//g = Math.Sqrt(g1 * g1 + g2 * g2);
//b = Math.Sqrt(b1 * b1 + b2 * b2);
r = (r > 255 ? 255 : (r < 0 ? 0 : r));
g = (g > 255 ? 255 : (g < 0 ? 0 : g));
b = (b > 255 ? 255 : (b < 0 ? 0 : b));
int rgb = (int)r * 0x10000 + (int)g * 0x100 + (int)b;
if (!Exist.Contains(rgb))
{
Exist.Add(rgb);
ExistID.Add(i * 256 + xy);
}
}
}
}
}
else if (type == PERCEIVED_COLOR)
{
for (int i = 0; i < 2; i++)
{
for (int xy = 0; xy < 256; xy++)
{
int rgb1 = LIST_RGB_COLOR[xy & 15];
int rgb2 = LIST_RGB_COLOR[xy / 16];
CIELab lab1 = ColorConverter.RGBtoLab(rgb1);
CIELab lab2 = ColorConverter.RGBtoLab(rgb2);
if (i == 0) // 75% Foreground 25% Background
{
double l = (lab1.L * 3 + lab2.L) / 4.0;
double a = (lab1.A * 3 + lab2.A) / 4.0;
double b = (lab1.B * 3 + lab2.B) / 4.0;
CIELab lab = new CIELab(l, a, b);
int rgb = ColorConverter.LabtoRGB(lab);
if (!Exist.Contains(rgb))
{
Exist.Add(rgb);
ExistID.Add(i * 256 + xy);
}
}
else // 50% Foreground 50% Background
{
double l = (lab1.L + lab2.L) / 2.0;
double a = (lab1.A + lab2.A) / 2.0;
double b = (lab1.B + lab2.B) / 2.0;
CIELab lab = new CIELab(l, a, b);
int rgb = ColorConverter.LabtoRGB(lab);
if (!Exist.Contains(rgb))
{
Exist.Add(rgb);
ExistID.Add(i * 256 + xy);
}
}
}
}
}
}
public double DeltaE(CIELab c1, CIELab c2)
{
double xC1, xC2, xCX, xGX, xNN, xH1, xH2, xDL, xDC, xDH, xLX, xCY, xHX, xTX, xPH, xRC, xSL, xSC, xSH, xRT, WHT_L = 1, WHT_C = 1, WHT_H = 1;
xC1 = Math.Sqrt(c1.a * c1.a + c1.b * c1.b);
xC2 = Math.Sqrt(c2.a * c2.a + c2.b * c2.b);
xCX = (xC1 + xC2) / 2;
xGX = 0.5 * (1 - Math.Sqrt(Math.Pow(xCX, 7) / (Math.Pow(xCX, 7) + Math.Pow(25, 7))));
xNN = (1 + xGX) * c1.a;
xC1 = Math.Sqrt(xNN * xNN + c1.b * c1.b);
xH1 = CieLab2Hue(xNN, c1.b);
xNN = (1 + xGX) * c2.a;
xC2 = Math.Sqrt(xNN * xNN + c2.b * c2.b);
xH2 = CieLab2Hue(xNN, c2.b);
xDL = c2.L - c1.L;
xDC = xC2 - xC1;
if ((xC1 * xC2) == 0)
{
xDH = 0;
}
else
{
xNN = Math.Round(xH2 - xH1, 12);
if (Math.Abs(xNN) <= 180)
{
xDH = xH2 - xH1;
}
else
{
if (xNN > 180)
{
xDH = xH2 - xH1 - 360;
}
else
{
xDH = xH2 - xH1 + 360;
}
}
}
xDH = 2 * Math.Sqrt(xC1 * xC2) * Math.Sin(deg2rad(xDH / 2));
xLX = (c1.L + c2.L) / 2;
xCY = (xC1 + xC2) / 2;
if ((xC1 * xC2) == 0)
{
xHX = xH1 + xH2;
}
else
{
xNN = Math.Abs(Math.Round(xH1 - xH2, 12));
if (xNN > 180)
{
if ((xH2 + xH1) < 360)
{
xHX = xH1 + xH2 + 360;
}
else
{
xHX = xH1 + xH2 - 360;
}
}
else
{
xHX = xH1 + xH2;
}
xHX /= 2;
}
xTX = 1 - 0.17 * Math.Cos(deg2rad(xHX - 30)) + 0.24
* Math.Cos(deg2rad(2 * xHX)) + 0.32
* Math.Cos(deg2rad(3 * xHX + 6)) - 0.20
* Math.Cos(deg2rad(4 * xHX - 63));
xPH = 30 * Math.Exp(-((xHX - 275) / 25) * ((xHX - 275) / 25));
xRC = 2 * Math.Sqrt(Math.Pow(xCY, 7) / (Math.Pow(xCY, 7) + Math.Pow(25, 7)));
xSL = 1 + ((0.015 * ((xLX - 50) * (xLX - 50)))
/ Math.Sqrt(20 + ((xLX - 50) * (xLX - 50))));
xSC = 1 + 0.045 * xCY;
xSH = 1 + 0.015 * xCY * xTX;
xRT = -1 * Math.Sin(deg2rad(2 * xPH)) * xRC;
xDL /= (WHT_L * xSL);
xDC /= (WHT_C * xSC);
xDH /= (WHT_H * xSH);
return(Math.Sqrt(Math.Pow(xDL, 2) + Math.Pow(xDC, 2) + Math.Pow(xDH, 2) + xRT * xDC * xDH));
}
// LAB & XYZ -> RGB
public static int LabtoRGB(CIELab lab)
{
CIEXYZ xyz = LabtoXYZ(lab.L, lab.A, lab.B);
return(XYZtoRGB(xyz.X, xyz.Y, xyz.Z));
}