/// <summary>
/// Converts a colour from HSL to RGB
/// </summary>
/// <remarks>Adapted from the algoritm in Foley and Van-Dam</remarks>
/// <param name="hsl">The HSL value</param>
/// <returns>A Color structure containing the equivalent RGB values</returns>
public static Color HSL_to_RGB(HSL hsl)
{
double r = 0, g = 0, b = 0;
double temp1, temp2;
if (hsl.L == 0) r = g = b = 0;
else
{
if (hsl.S == 0) r = g = b = hsl.L;
else
{
temp2 = ((hsl.L <= 0.5) ? hsl.L*(1.0 + hsl.S) : hsl.L + hsl.S - (hsl.L*hsl.S));
temp1 = 2.0*hsl.L - temp2;
var t3 = new[] { hsl.H + 1.0/3.0, hsl.H, hsl.H - 1.0/3.0 };
var clr = new double[] { 0, 0, 0 };
for (int i = 0; i < 3; i++)
{
if (t3[i] < 0) t3[i] += 1.0;
if (t3[i] > 1) t3[i] -= 1.0;
if (6.0*t3[i] < 1.0) clr[i] = temp1 + (temp2 - temp1)*t3[i]*6.0;
else if (2.0*t3[i] < 1.0) clr[i] = temp2;
else if (3.0*t3[i] < 2.0) clr[i] = (temp1 + (temp2 - temp1)*((2.0/3.0) - t3[i])*6.0);
else clr[i] = temp1;
}
r = clr[0];
g = clr[1];
b = clr[2];
}
}
return Color.FromArgb((int)(255*r), (int)(255*g), (int)(255*b));
}
public object Convert(Object value, Type targetType, object param, System.Globalization.CultureInfo culture)
{
var is_read_only = (bool)value;
Color c;
String sc;
if ((sc = param as String) != null)
c = sc.ToColor();
else if (param is Color)
c = (Color)param;
else if (param is HSL)
c = ((HSL)param).ToRGB();
else
throw new InvalidOperationException();
if (!is_read_only)
{
var hsl = new HSL(c);
hsl.S *= .90;
hsl.L *= 1.08;
c = hsl.ToRGB();
}
return new SolidColorBrush(c);
}
//
/// <summary>
/// Converts RGB to HSL
/// </summary>
/// <remarks>Takes advantage of whats already built in to .NET by using the Color.GetHue, Color.GetSaturation and Color.GetBrightness methods</remarks>
/// <param name="c">A Color to convert</param>
/// <returns>An HSL value</returns>
public static HSL GetHSL(Color c)
{
HSL hsl = new HSL();
hsl.H = c.GetHue() / 360.0; // we store hue as 0-1 as opposed to 0-360
hsl.L = c.GetBrightness();
hsl.S = c.GetSaturation();
return hsl;
}
/// <summary>
/// Initializes a new instance of the <see cref="ColorSliderVertical"/> class.
/// </summary>
/// <param name="name">The name.</param>
public ColorSliderVertical(string name) : base(name)
{
// Initialize Colors
this.hsl = new HSL {
H = 1.0, S = 1.0, L = 1.0
};
this.rgba = AdobeColors.HSLToRGB(this.hsl);
// pick a format to show
this.drawStyle = DrawStyle.Hue;
this.Padding = 9;
Config.Width = Theme.ControlHeight;
Config.Height = Theme.ControlWidth;
}
static Color TintColor(Color c, Color tint)
{
double th, ts, tl;
HSL.RGB2HSL(tint, out th, out ts, out tl);
double ch, cs, cl;
HSL.RGB2HSL(c, out ch, out cs, out cl);
Color color = HSL.HSL2RGB(th, ts, cl);
color.A = c.A;
return(color);
}
private void SetColor(Point mousePoint)
{
int hue;
double sat, lum;
switch (_selectMode)
{
default:
hue = (int)(((double)mousePoint.X / Width) * 360);
sat = _drawHsl.Saturation;
lum = 1 - (double)mousePoint.Y / Height;
break;
}
SelectedHsl = new HSL(hue, sat, lum);
}
//
/// <summary>
/// Converts RGB to HSL
/// </summary>
/// <remarks>Takes advantage of whats already built in to .NET by using the Color.GetHue, Color.GetSaturation and Color.GetBrightness methods</remarks>
/// <param name="c">A Color to convert</param>
/// <returns>An HSL value</returns>
public static HSL RGB_to_HSL(Color c)
{
HSL hsl = new HSL();
hsl.H = c.GetHue() / 360.0; // we store hue as 0-1 as opposed to 0-360
hsl.L = c.GetBrightness();
hsl.S = c.GetSaturation();
return(hsl);
}
public RGB Convert(HSL input)
{
double h = input.H / 60.0, s = input.S, l = input.L;
double r = l, g = l, b = l;
if (s > 0)
{
var chroma = (1.0 - (2.0 * l - 1.0).Absolute()) * s;
var x = chroma * (1.0 - ((h % 2.0) - 1).Absolute());
var result = new Vector(0.0, 0, 0);
if (0 <= h && h <= 1)
{
result = new Vector(chroma, x, 0);
}
else if (1 <= h && h <= 2)
{
result = new Vector(x, chroma, 0);
}
else if (2 <= h && h <= 3)
{
result = new Vector(0.0, chroma, x);
}
else if (3 <= h && h <= 4)
{
result = new Vector(0.0, x, chroma);
}
else if (4 <= h && h <= 5)
{
result = new Vector(x, 0, chroma);
}
else if (5 <= h && h <= 6)
{
result = new Vector(chroma, 0, x);
}
var m = l - (0.5 * chroma);
r = result[0] + m;
g = result[1] + m;
b = result[2] + m;
}
return(new RGB(r, g, b));
}
public void GenerateHSLCharts()
{
var pixelFormat = PixelFormat.Format24bppRgb;
Directory.CreateDirectory("hsl");
for (var l = 0; l < 256; l++)
{
using (var bitmap = new Bitmap(360, 256, pixelFormat))
{
var bits = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadWrite, pixelFormat);
try
{
unsafe
{
void *pData = bits.Scan0.ToPointer();
byte *pRow = (byte *)pData;
for (var s = 0; s < 256; s++)
{
BitmapRGB *pCol = (BitmapRGB *)pRow;
for (var h = 0; h < 360; h++)
{
var hsl = new HSL((ushort)h, (byte)s, (byte)l);
var rgb = hsl.ToRGB();
pCol->R = rgb.R;
pCol->G = rgb.G;
pCol->B = rgb.B;
pCol++;
}
pRow += bits.Stride;
}
}
}
finally
{
bitmap.UnlockBits(bits);
}
bitmap.Save($@"hsl\{l}.bmp", ImageFormat.Bmp);
}
}
}
static Color TintColor(Color c, Color tint)
{
return(SimpleTint(c, tint));
#if asd
double th, ts, tl;
HSL.RGB2HSL(tint, out th, out ts, out tl);
double ch, cs, cl;
HSL.RGB2HSL(c, out ch, out cs, out cl);
Color color = HSL.HSL2RGB(th, ts, cl);
color.A = c.A;
return(color);
#endif
}
public static Color ToRGB(HSL hsl)
{
if (hsl.S == 0)
{
var rgb = (int)(255 * hsl.L);
return(Color.FromArgb(rgb, rgb, rgb));
}
var q2 = hsl.L <= .5 ? hsl.L * (1 + hsl.S) : hsl.L + hsl.S - hsl.L * hsl.S;
var q1 = 2 * hsl.L - q2;
int r = (int)(255 * HueToRGB(q1, q2, hsl.H + 120));
int g = (int)(255 * HueToRGB(q1, q2, hsl.H));
int b = (int)(255 * HueToRGB(q1, q2, hsl.H - 120));
return(Color.FromArgb(r, g, b));
}
/// <summary>
/// Resets the controls color (both HSL and RGB variables) based on the current marker position
/// </summary>
private void ResetHSLRGB()
{
int red, green, blue;
switch (_drawStyle)
{
case eDrawStyle.Hue:
_hsl.S = (double)_markerX / (this.Width - 4);
_hsl.L = 1.0 - (double)_markerY / (this.Height - 4);
_rgb = ColorManager.HSL_to_RGB(_hsl);
break;
case eDrawStyle.Saturation:
_hsl.H = (double)_markerX / (this.Width - 4);
_hsl.L = 1.0 - (double)_markerY / (this.Height - 4);
_rgb = ColorManager.HSL_to_RGB(_hsl);
break;
case eDrawStyle.Brightness:
_hsl.H = (double)_markerX / (this.Width - 4);
_hsl.S = 1.0 - (double)_markerY / (this.Height - 4);
_rgb = ColorManager.HSL_to_RGB(_hsl);
break;
case eDrawStyle.Red:
blue = Round(255 * (double)_markerX / (this.Width - 4));
green = Round(255 * (1.0 - (double)_markerY / (this.Height - 4)));
_rgb = Color.FromArgb(_rgb.R, green, blue);
_hsl = ColorManager.RGB_to_HSL(_rgb);
break;
case eDrawStyle.Green:
blue = Round(255 * (double)_markerX / (this.Width - 4));
red = Round(255 * (1.0 - (double)_markerY / (this.Height - 4)));
_rgb = Color.FromArgb(red, _rgb.G, blue);
_hsl = ColorManager.RGB_to_HSL(_rgb);
break;
case eDrawStyle.Blue:
red = Round(255 * (double)_markerX / (this.Width - 4));
green = Round(255 * (1.0 - (double)_markerY / (this.Height - 4)));
_rgb = Color.FromArgb(red, green, _rgb.B);
_hsl = ColorManager.RGB_to_HSL(_rgb);
break;
}
}
private static ColorResult ConvertCMYK(ColorSpace resultSpace, ColorSource source)
{
ColorResult color;
double c = source.component0;
double m = source.component1;
double y = source.component2;
double k = source.component3;
switch (resultSpace)
{
case ColorSpace.RGBSpace:
RGB rgb = ColorConverter.CMYKtoRGB(c, m, y, k);
color = new ColorResult(rgb.Red, rgb.Green, rgb.Blue);
break;
case ColorSpace.HSBSpace:
HSB hsb = ColorConverter.CMYKtoHSB(c, m, y, k);
color = new ColorResult(hsb.Hue, hsb.Saturation, hsb.Brightness);
break;
case ColorSpace.HSLSpace:
HSL hsl = ColorConverter.CMYKtoHSL(c, m, y, k);
color = new ColorResult(hsl.Hue, hsl.Saturation, hsl.Luminance);
break;
case ColorSpace.LabSpace:
Lab lab = ColorConverter.CMYKtoLab(c, m, y, k);
color = ScaleCIELabOutputRange(lab);
break;
case ColorSpace.XYZSpace:
XYZ xyz = ColorConverter.CMYKtoXYZ(c, m, y, k);
color = new ColorResult(xyz.X, xyz.Y, xyz.Z);
break;
case ColorSpace.GraySpace:
color = new ColorResult(ColorConverter.CMYKtoRGB(c, m, y, k).GetIntensity(source.maxChannelValue));
break;
default:
throw new InvalidEnumArgumentException("Unsupported color space conversion", (int)resultSpace, typeof(ColorSpace));
}
return(color);
}
/// <summary>
/// Returns a list of colors that are monochromatic in relation to the source
/// </summary>
public static List <Color> Monochromatic(Color sourceColor, int howMany = 4)
{
List <Color> palette = new List <Color>();
HSL source = HSL.fromColor(sourceColor); //Convert to HSL
for (int i = 0; i < howMany; i++)
{
HSL hsl = HSL.Copy(source); //Create a copy of the source HSL
hsl.Lightness *= (howMany / 2 - i); //Change the lightness of it
Color color = hsl.toColor(); //Convert it back
color.a = sourceColor.a; //Add back in the Alpha value
palette.Add(color); //Add it to the palette
}
return(palette);
}
/// <summary>
/// Create a dot to test the position of colors on the shade triangle
/// </summary>
private void TestDot(Graphics g, double sat, double lum)
{
var W = _testDotSize;
var HSL = new HSL(_hsl.H, sat, lum);
var pt = LocateColorMarker(HSL);
var Rectangle = new Rectangle(pt.X - W / 2, pt.Y - W / 2, W, W);
using (var SolidBrush = new SolidBrush(ColorManager.HSL_to_RGB(HSL)))
{
g.FillEllipse(SolidBrush, Rectangle);
if (_dotOutline)
{
g.DrawEllipse(Pens.Black, Rectangle);
}
}
HSL = null;
}
public static HSV ToHsv(this HSL hsl)
{
if (hsl == default(HSL))
{
return(default(HSV));
}
double ll = hsl.L;
double ss = (ll <= 0.5) ? ll : 1.0 - ll;
double V = ll + ss;
double S = (2 * ss) / (ll + ss);
return(new HSV()
{
H = hsl.H, S = S, V = V
});
}
public static Color ToComplement(this Color c)
{
HSL hsl = c.ToHsl();
hsl.H += 0.5f;
if (hsl.H > 1)
{
hsl.H -= 1;
}
Color ret = hsl.ToColor();
if (ret == c)
{
hsl.L = 1 - hsl.L;
}
return(hsl.ToColor());
}
/// <summary>
/// Determines the next color to use in the bar based on the drawing style and the last color used.
/// </summary>
/// <param name="oldColor">Last color used.</param>
/// <param name="sgn">Multiplication value for the delta. Used to subtract the value, instead of adding it.</param>
private HSL GetDeltaColor(HSL oldColor, int sgn, bool allowWrap)
{
var HSL = new HSL();
var Hue = oldColor.Hue;
var Saturation = oldColor.Saturation;
var Luminance = oldColor.Luminance;
var Alpha = oldColor.Alpha;
if (_reverseFill)
{
sgn *= -1;
}
switch (_drawStyle)
{
case eDrawStyle.Hue:
case eDrawStyle.HueOffset:
Hue += (_deltaValue * sgn);
Hue = AdjustValue(Hue, allowWrap);
return(new HSL(Hue, Saturation, Luminance, Alpha));
case eDrawStyle.Luminance:
Luminance += (_deltaValue * sgn);
Luminance = AdjustValue(Luminance, allowWrap);
return(new HSL(Hue, Saturation, Luminance, Alpha));
case eDrawStyle.Saturation:
case eDrawStyle.SaturationWithInversion:
Saturation += (_deltaValue * sgn);
Saturation = AdjustValue(Saturation, allowWrap);
Luminance += ((_deltaValue * sgn) / 2);
Luminance = AdjustValue(Luminance, allowWrap);
return(new HSL(Hue, Saturation, Luminance, Alpha));
case eDrawStyle.Transparency:
Alpha += (_deltaValue * sgn);
Alpha = AdjustValue(Alpha, allowWrap);
return(new HSL(Hue, Saturation, Luminance, Alpha));
default:
return(ColorManager.RGB_to_HSL(SystemColors.Control));
}
}
protected Bitmap ResultLuminanceToOutputBitmapAsColor()
{
// normalize luminance
float max = float.MinValue;
float min = float.MaxValue;
// data for normalization from 0 to 255
for (int x = 0; x < _inputBitmap.Width; x++)
{
for (int y = 0; y < _inputBitmap.Height; y++)
{
if (_outputLuminance[y, x] > max)
{
max = _outputLuminance[y, x];
}
if (_outputLuminance[y, x] < min)
{
min = _outputLuminance[y, x];
}
}
}
Bitmap resultBitmap = new Bitmap(_inputBitmap);
for (int x = 0; x < _inputBitmap.Width; x++)
{
for (int y = 0; y < _inputBitmap.Height; y++)
{
// make it color
var luminanceOutputScaledFrom0to1 = (_outputLuminance[y, x] - min) / (max - min);
HSL hslOutput = new HSL()
{
Luminance = luminanceOutputScaledFrom0to1,
Saturation = _inputSaturation[y, x],
Hue = _inputHue[y, x]
};
RGB rgbOutput = new RGB();
HSL.ToRGB(hslOutput, rgbOutput);
Color color = Color.FromArgb(rgbOutput.Red, rgbOutput.Green, rgbOutput.Blue);
resultBitmap.SetPixel(x, y, color);
}
}
return(resultBitmap);
}
private static ColorResult ConvertHSB(ColorSpace resultSpace, ColorSource source)
{
ColorResult color;
double h = source.component0;
double s = source.component1;
double b = source.component2;
switch (resultSpace)
{
case ColorSpace.RGBSpace:
RGB rgb = ColorConverter.HSBtoRGB(h, s, b);
color = new ColorResult(rgb.Red, rgb.Green, rgb.Blue);
break;
case ColorSpace.CMYKSpace:
CMYK cmyk = ColorConverter.HSBtoCMYK(h, s, b);
color = new ColorResult(cmyk.Cyan, cmyk.Magenta, cmyk.Yellow, cmyk.Black);
break;
case ColorSpace.HSLSpace:
HSL hsl = ColorConverter.HSBtoHSL(h, s, b);
color = new ColorResult(hsl.Hue, hsl.Saturation, hsl.Luminance);
break;
case ColorSpace.LabSpace:
Lab lab = ColorConverter.HSBToLab(h, s, b);
color = ScaleCIELabOutputRange(lab);
break;
case ColorSpace.XYZSpace:
XYZ xyz = ColorConverter.HSBtoXYZ(h, s, b);
color = new ColorResult(xyz.X, xyz.Y, xyz.Z);
break;
case ColorSpace.GraySpace:
color = new ColorResult(ColorConverter.HSBtoRGB(h, s, b).GetIntensity(source.maxChannelValue));
break;
default:
throw new InvalidEnumArgumentException(nameof(resultSpace), (int)resultSpace, typeof(ColorSpace));
}
return(color);
}
/// <summary>
/// Converts a color from HSL to RGB</summary>
/// <remarks>Adapted from the algorithm in Foley and Van-Dam</remarks>
/// <param name="hsl">The HSL value</param>
/// <returns>A Color structure containing the equivalent RGB values</returns>
public static Color HSL_to_RGB(HSL hsl)
{
int Max, Mid, Min;
double q;
int alpha = Round(255 * hsl.A);
Max = Round(hsl.L * 255);
Min = Round((1.0 - hsl.S) * (hsl.L / 1.0) * 255);
q = (double)(Max - Min) / 255;
if (hsl.H >= 0 && hsl.H <= (double)1 / 6)
{
Mid = Round(((hsl.H - 0) * q) * 1530 + Min);
return(Color.FromArgb(alpha, Max, Mid, Min));
}
else if (hsl.H <= (double)1 / 3)
{
Mid = Round(-((hsl.H - (double)1 / 6) * q) * 1530 + Max);
return(Color.FromArgb(alpha, Mid, Max, Min));
}
else if (hsl.H <= 0.5)
{
Mid = Round(((hsl.H - (double)1 / 3) * q) * 1530 + Min);
return(Color.FromArgb(alpha, Min, Max, Mid));
}
else if (hsl.H <= (double)2 / 3)
{
Mid = Round(-((hsl.H - 0.5) * q) * 1530 + Max);
return(Color.FromArgb(alpha, Min, Mid, Max));
}
else if (hsl.H <= (double)5 / 6)
{
Mid = Round(((hsl.H - (double)2 / 3) * q) * 1530 + Min);
return(Color.FromArgb(alpha, Mid, Min, Max));
}
else if (hsl.H <= 1.0)
{
Mid = Round(-((hsl.H - (double)5 / 6) * q) * 1530 + Max);
return(Color.FromArgb(alpha, Max, Min, Mid));
}
else
{
return(Color.FromArgb(alpha, 0, 0, 0));
}
}
/// <summary>
/// Process the filter on the specified image.
/// </summary>
///
/// <param name="image">Source image data.</param>
/// <param name="rect">Image rectangle for processing by the filter.</param>
///
protected override unsafe void ProcessFilter(UnmanagedImage image, Rectangle rect)
{
int pixelSize = Bitmap.GetPixelFormatSize(image.PixelFormat) / 8;
int startX = rect.Left;
int startY = rect.Top;
int stopX = startX + rect.Width;
int stopY = startY + rect.Height;
int offset = image.Stride - rect.Width * pixelSize;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
// do the job
byte *ptr = (byte *)image.ImageData.ToPointer( );
// allign pointer to the first pixel to process
ptr += (startY * image.Stride + startX * pixelSize);
// for each row
for (int y = startY; y < stopY; y++)
{
// for each pixel
for (int x = startX; x < stopX; x++, ptr += pixelSize)
{
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
AForgeCore.Imaging.HSL.FromRGB(rgb, hsl);
// modify hue value
hsl.Hue = hue;
// convert back to RGB
AForgeCore.Imaging.HSL.ToRGB(hsl, rgb);
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
ptr += offset;
}
}
private static ColorResult ConvertLAB(ColorSpace resultSpace, ColorSource source)
{
ColorResult color;
double l = source.component0;
double a = source.component1;
double b = source.component2;
switch (resultSpace)
{
case ColorSpace.RGBSpace:
RGB rgb = ColorConverter.LabtoRGB(l, a, b);
color = new ColorResult(rgb.Red, rgb.Green, rgb.Blue);
break;
case ColorSpace.CMYKSpace:
CMYK cmyk = ColorConverter.LabtoCMYK(l, a, b);
color = new ColorResult(cmyk.Cyan, cmyk.Magenta, cmyk.Yellow, cmyk.Black);
break;
case ColorSpace.HSBSpace:
HSB hsb = ColorConverter.LabtoHSB(l, a, b);
color = new ColorResult(hsb.Hue, hsb.Saturation, hsb.Brightness);
break;
case ColorSpace.HSLSpace:
HSL hsl = ColorConverter.LabtoHSL(l, a, b);
color = new ColorResult(hsl.Hue, hsl.Saturation, hsl.Luminance);
break;
case ColorSpace.XYZSpace:
XYZ xyz = ColorConverter.LabtoXYZ(l, a, b);
color = new ColorResult(xyz.X, xyz.Y, xyz.Z);
break;
case ColorSpace.GraySpace:
color = new ColorResult(ColorConverter.LabtoRGB(l, a, b).GetIntensity(source.maxChannelValue));
break;
default:
throw new InvalidEnumArgumentException("Unsupported color space conversion", (int)resultSpace, typeof(ColorSpace));
}
return(color);
}
private static ColorResult ConvertRGB(ColorSpace resultSpace, ColorSource source)
{
ColorResult color;
double red = source.component0;
double green = source.component1;
double blue = source.component2;
switch (resultSpace)
{
case ColorSpace.CMYKSpace:
CMYK cmyk = ColorConverter.RGBtoCMYK(red, green, blue);
color = new ColorResult(cmyk.Cyan, cmyk.Magenta, cmyk.Yellow, cmyk.Black);
break;
case ColorSpace.GraySpace:
color = new ColorResult(ColorConverter.GetRGBIntensity(red, green, blue, source.maxChannelValue));
break;
case ColorSpace.HSBSpace:
HSB hsb = ColorConverter.RGBtoHSB(red, green, blue);
color = new ColorResult(hsb.Hue, hsb.Saturation, hsb.Brightness);
break;
case ColorSpace.HSLSpace:
HSL hsl = ColorConverter.RGBtoHSL(red, green, blue);
color = new ColorResult(hsl.Hue, hsl.Saturation, hsl.Luminance);
break;
case ColorSpace.LabSpace:
Lab lab = ColorConverter.RGBtoLab(red, green, blue);
color = ScaleCIELabOutputRange(lab);
break;
case ColorSpace.XYZSpace:
XYZ xyz = ColorConverter.RGBtoXYZ(red, green, blue);
color = new ColorResult(xyz.X, xyz.Y, xyz.Z);
break;
default:
throw new InvalidEnumArgumentException("Unsupported color space conversion", (int)resultSpace, typeof(ColorSpace));
}
return(color);
}
private static ColorResult ConvertXYZ(ColorSpace resultSpace, ColorSource source)
{
ColorResult color;
double x = source.component0;
double y = source.component1;
double z = source.component2;
switch (resultSpace)
{
case ColorSpace.RGBSpace:
RGB rgb = ColorConverter.XYZtoRGB(x, y, z);
color = new ColorResult(rgb.Red, rgb.Green, rgb.Blue);
break;
case ColorSpace.CMYKSpace:
CMYK cmyk = ColorConverter.XYZtoCMYK(x, y, z);
color = new ColorResult(cmyk.Cyan, cmyk.Magenta, cmyk.Yellow, cmyk.Black);
break;
case ColorSpace.HSBSpace:
HSB hsb = ColorConverter.XYZtoHSB(x, y, z);
color = new ColorResult(hsb.Hue, hsb.Saturation, hsb.Brightness);
break;
case ColorSpace.HSLSpace:
HSL hsl = ColorConverter.XYZtoHSL(x, y, z);
color = new ColorResult(hsl.Hue, hsl.Saturation, hsl.Luminance);
break;
case ColorSpace.LabSpace:
Lab lab = ColorConverter.XYZtoLab(x, y, z);
color = ScaleCIELabOutputRange(lab);
break;
case ColorSpace.GraySpace:
color = new ColorResult(ColorConverter.XYZtoRGB(x, y, z).GetIntensity(source.maxChannelValue));
break;
default:
throw new InvalidEnumArgumentException("Unsupported color space conversion", (int)resultSpace, typeof(ColorSpace));
}
return(color);
}
internal static double GetHueDist(Matrix <double> values, Matrix <double> targets, int subdivisions)
{
var hueCounter = 0;
var valDist = new double[10];
var tarDist = new double[10];
var sizeRatio = targets.RowCount / values.RowCount;
for (int i = 0; i < values.RowCount; i++)
{
var rgb = new RGB((byte)(values[i, 0] * 255), (byte)(values[i, 1] * 255), (byte)(values[i, 2] * 255));
var hue = HSL.FromRGB(rgb).Hue;
int bucket = (int)hue / 36;
if (bucket > 9)
{
bucket = 9;
}
valDist[bucket]++;
// hueCounter += hue;
}
for (int i = 0; i < targets.RowCount; i++)
{
var rgb = new RGB((byte)(targets[i, 0] * 255), (byte)(targets[i, 1] * 255), (byte)(targets[i, 2] * 255));
var hue = HSL.FromRGB(rgb).Hue;
int bucket = (int)hue / 36;
if (bucket > 9)
{
bucket = 9;
}
tarDist[bucket]++;
//hueCounter += hue;
}
valDist = valDist.Select(x => x / (subdivisions * subdivisions)).ToArray();
tarDist = tarDist.Select(x => x / (sizeRatio * (subdivisions * subdivisions))).ToArray();
var distDist = FeatureDistance(valDist, tarDist);
return(distDist);
}
public static HSV RGB2HSV(RGB rgb)
{
float R = rgb.Red / 255;
float G = rgb.Green / 255;
float B = rgb.Blue / 255;
float max = Math.Max(Math.Max(R, B), G);
float min = Math.Min(Math.Min(R, B), G);
float delta = max - min;
float Sat = (delta == 0) ? 0 : (Sat = delta / max);
HSL hsl = RGB2HSL(rgb);
float H = hsl.Hue;
float S = Sat;
float V = max;
return(new HSV(H, S, V));
}
// slider controls hue
// x = saturation 0 -> 100
// y = Lightness 100 -> 0
protected override void DrawHSLHue()
{
using (Graphics g = Graphics.FromImage(bmp))
{
HSL start = new HSL((int)selectedColor.HSL.Hue360, 0, 0, selectedColor.ARGB.A);
HSL end = new HSL((int)selectedColor.HSL.Hue360, 100, 0, selectedColor.ARGB.A);
for (int y = 0; y < clientHeight; y++)
{
start.Lightness = end.Lightness = (float)(1.0 - ((double)y / (clientHeight)));
using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, clientWidth, 1), start, end, LinearGradientMode.Horizontal))
{
g.FillRectangle(brush, new Rectangle(0, y, clientWidth, 1));
}
}
}
}
// slider controls lightness
// x = hue 0 -> 360
// y = saturation 100 -> 0
protected override void DrawHSLLightness()
{
using (Graphics g = Graphics.FromImage(bmp))
{
HSL start = new HSL(0, 100, (int)selectedColor.HSL.Lightness100, selectedColor.ARGB.A);
HSL end = new HSL(0, 0, (int)selectedColor.HSL.Lightness100, selectedColor.ARGB.A);
for (int x = 0; x < clientWidth; x++)
{
start.Hue = end.Hue = (float)((double)x / (clientHeight));
using (LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, 1, clientHeight), start, end, LinearGradientMode.Vertical))
{
g.FillRectangle(brush, new Rectangle(x, 0, 1, clientHeight));
}
}
}
}
public mFilterHSL(wDomain HueValue, wDomain SaturationValue, wDomain LuminanceValue, bool isOut, Color fillColor)
{
Hue = HueValue;
Sat = SaturationValue;
Lum = LuminanceValue;
IsOut = isOut;
FillColor = fillColor;
BitmapType = mFilter.BitmapTypes.None;
Effect = new HSLFiltering(new Accord.IntRange((int)Hue.T0, (int)Hue.T1), new Accord.Range((float)Sat.T0, (float)Sat.T1), new Accord.Range((float)Lum.T0, (float)Lum.T1));
Effect.FillOutsideRange = IsOut;
Effect.FillColor = HSL.FromRGB(new RGB(FillColor));
filter = Effect;
}
// Adapted from the algorithm in Foley and Van-Dam
// (Computer Graphics: Principles and Practice)
public static Color HSL2RGB(HSL hsl)
{
int max, mid, min;
double q;
max = Round(hsl.L * 255);
min = Round((1.0 - hsl.S) * (hsl.L / 1.0) * 255);
q = (max - min) / 255.0;
if (hsl.H >= 0 && hsl.H <= 1 / 6.0)
{
mid = Round(((hsl.H - 0) * q) * 1530 + min);
return Color.FromArgb(max, mid, min);
}
else if (hsl.H <= 1 / 3.0)
{
mid = Round(-((hsl.H - 1 / 6.0) * q) * 1530 + max);
return Color.FromArgb(mid, max, min);
}
else if (hsl.H <= 1 / 2.0)
{
mid = Round(((hsl.H - 1 / 3.0) * q) * 1530 + min);
return Color.FromArgb(min, max, mid);
}
else if (hsl.H <= 2 / 3.0)
{
mid = Round(-((hsl.H - 1 / 2.0) * q) * 1530 + max);
return Color.FromArgb(min, mid, max);
}
else if (hsl.H <= 5 / 6.0)
{
mid = Round(((hsl.H - 2 / 3.0) * q) * 1530 + min);
return Color.FromArgb(mid, min, max);
}
else if (hsl.H <= 1.0)
{
mid = Round(-((hsl.H - 5 / 6.0) * q) * 1530 + max);
return Color.FromArgb(max, min, mid);
}
else
{
return Color.Black;
}
}
private static ColorResult ConvertGray(ColorSpace resultSpace, ColorSource source)
{
ColorResult color;
double gray = source.component0;
switch (resultSpace)
{
case ColorSpace.RGBSpace:
color = new ColorResult(gray, gray, gray);
break;
case ColorSpace.CMYKSpace:
CMYK cmyk = ColorConverter.RGBtoCMYK(gray, gray, gray);
color = new ColorResult(cmyk.Cyan, cmyk.Magenta, cmyk.Yellow, cmyk.Black);
break;
case ColorSpace.HSBSpace:
HSB hsb = ColorConverter.RGBtoHSB(gray, gray, gray);
color = new ColorResult(hsb.Hue, hsb.Saturation, hsb.Brightness);
break;
case ColorSpace.HSLSpace:
HSL hsl = ColorConverter.RGBtoHSL(gray, gray, gray);
color = new ColorResult(hsl.Hue, hsl.Saturation, hsl.Luminance);
break;
case ColorSpace.LabSpace:
Lab lab = ColorConverter.RGBtoLab(gray, gray, gray);
color = ScaleCIELabOutputRange(lab);
break;
case ColorSpace.XYZSpace:
XYZ xyz = ColorConverter.RGBtoXYZ(gray, gray, gray);
color = new ColorResult(xyz.X, xyz.Y, xyz.Z);
break;
default:
throw new InvalidEnumArgumentException(nameof(resultSpace), (int)resultSpace, typeof(ColorSpace));
}
return(color);
}
public RGB(HSL hsl)
{
double C = (1 - Math.Abs(2 * hsl.L - 1)) * hsl.S;
double X = C * (1 - Math.Abs((hsl.H / 60) % 2 - 1));
double m = hsl.L - (C / 2);
double r, g, b;
switch ((int)hsl.H / 60)
{
case 0:
r = C; g = X; b = 0;
break;
case 1:
r = X; g = C; b = 0;
break;
case 2:
r = 0; g = C; b = X;
break;
case 3:
r = 0; g = X; b = C;
break;
case 4:
r = X; g = 0; b = C;
break;
case 5:
r = C; g = 0; b = X;
break;
default:
r = 0; g = 0; b = 0;
break;
}
R = (byte)((r + m) * 31);
G = (byte)((g + m) * 31);
B = (byte)((b + m) * 31);
}
public unsafe Bitmap Apply(Bitmap srcImg)
{
if (srcImg.PixelFormat != PixelFormat.Format24bppRgb)
{
throw new ArgumentException();
}
int width = srcImg.Width;
int height = srcImg.Height;
BitmapData bitmapdata = srcImg.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format24bppRgb);
BitmapData data2 = bitmap.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadWrite, PixelFormat.Format24bppRgb);
RGB rgb = new RGB();
HSL hsl = new HSL();
int num3 = bitmapdata.Stride - (width * 3);
byte * numPtr = (byte *)bitmapdata.Scan0.ToPointer();
byte * numPtr2 = (byte *)data2.Scan0.ToPointer();
for (int i = 0; i < height; i++)
{
int num5 = 0;
while (num5 < width)
{
rgb.Red = numPtr[2];
rgb.Green = numPtr[1];
rgb.Blue = numPtr[0];
GodLesZ.Library.Imaging.ColorConverter.RGB2HSL(rgb, hsl);
hsl.Hue = this.hue;
GodLesZ.Library.Imaging.ColorConverter.HSL2RGB(hsl, rgb);
numPtr2[2] = rgb.Red;
numPtr2[1] = rgb.Green;
numPtr2[0] = rgb.Blue;
num5++;
numPtr += 3;
numPtr2 += 3;
}
numPtr += num3;
numPtr2 += num3;
}
bitmap.UnlockBits(data2);
srcImg.UnlockBits(bitmapdata);
return(bitmap);
}
/// <summary>
/// Converts a colour from HSL to RGB
/// </summary>
/// <remarks>Adapted from the algoritm in Foley and Van-Dam</remarks>
/// <param scriptName="hsl">The HSL value</param>
/// <returns>A Color structure containing the equivalent RGB values</returns>
public static Color HSL_to_RGB(HSL hsl)
{
int Max, Mid, Min;
double q;
Max = (int)Math.Round(hsl.L * 255);
Min = (int)Math.Round((1.0 - hsl.S) * (hsl.L / 1.0) * 255);
q = (double)(Max - Min)/255;
if ( hsl.H >= 0 && hsl.H <= (double)1/6 )
{
Mid = (int)Math.Round(((hsl.H - 0) * q) * 1530 + Min);
return Color.FromArgb(Max,Mid,Min);
}
else if ( hsl.H <= (double)1/3 )
{
Mid = (int)Math.Round(-((hsl.H - (double)1 / 6) * q) * 1530 + Max);
return Color.FromArgb(Mid,Max,Min);
}
else if ( hsl.H <= 0.5 )
{
Mid = (int)Math.Round(((hsl.H - (double)1 / 3) * q) * 1530 + Min);
return Color.FromArgb(Min,Max,Mid);
}
else if ( hsl.H <= (double)2/3 )
{
Mid = (int)Math.Round(-((hsl.H - 0.5) * q) * 1530 + Max);
return Color.FromArgb(Min,Mid,Max);
}
else if ( hsl.H <= (double)5/6 )
{
Mid = (int)Math.Round(((hsl.H - (double)2 / 3) * q) * 1530 + Min);
return Color.FromArgb(Mid,Min,Max);
}
else if ( hsl.H <= 1.0 )
{
Mid = (int)Math.Round(-((hsl.H - (double)5 / 6) * q) * 1530 + Max);
return Color.FromArgb(Max,Min,Mid);
}
else return Color.FromArgb(0,0,0);
}
// Process the filter
private unsafe void ProcessFilter( BitmapData data )
{
int width = data.Width;
int height = data.Height;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
int offset = data.Stride - width * 3;
bool updated;
// do the job
byte * ptr = (byte *) data.Scan0.ToPointer( );
// for each row
for ( int y = 0; y < height; y++ )
{
// for each pixel
for ( int x = 0; x < width; x++, ptr += 3 )
{
updated = false;
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
AForge.Imaging.ColorConverter.RGB2HSL( rgb, hsl );
// check HSL values
if (
( hsl.Saturation >= saturation.Min ) && ( hsl.Saturation <= saturation.Max ) &&
( hsl.Luminance >= luminance.Min ) && ( hsl.Luminance <= luminance.Max ) &&
(
( ( hue.Min < hue.Max ) && ( hsl.Hue >= hue.Min ) && ( hsl.Hue <= hue.Max ) ) ||
( ( hue.Min > hue.Max ) && ( ( hsl.Hue >= hue.Min ) || ( hsl.Hue <= hue.Max ) ) )
)
)
{
if ( !fillOutsideRange )
{
if ( updateH ) hsl.Hue = fillH;
if ( updateS ) hsl.Saturation = fillS;
if ( updateL ) hsl.Luminance = fillL;
updated = true;
}
}
else
{
if ( fillOutsideRange )
{
if ( updateH ) hsl.Hue = fillH;
if ( updateS ) hsl.Saturation = fillS;
if ( updateL ) hsl.Luminance = fillL;
updated = true;
}
}
if ( updated )
{
// convert back to RGB
AForge.Imaging.ColorConverter.HSL2RGB( hsl, rgb );
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
}
ptr += offset;
}
}
/// <summary>
/// Process the filter on the specified image.
/// </summary>
///
/// <param name="image">Source image data.</param>
/// <param name="rect">Image rectangle for processing by the filter.</param>
///
protected override unsafe void ProcessFilter( UnmanagedImage image, Rectangle rect )
{
int pixelSize = Bitmap.GetPixelFormatSize( image.PixelFormat ) / 8;
int startX = rect.Left;
int startY = rect.Top;
int stopX = startX + rect.Width;
int stopY = startY + rect.Height;
int offset = image.Stride - rect.Width * pixelSize;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
// do the job
byte* ptr = (byte*) image.ImageData.ToPointer( );
// allign pointer to the first pixel to process
ptr += ( startY * image.Stride + startX * pixelSize );
// for each row
for ( int y = startY; y < stopY; y++ )
{
// for each pixel
for ( int x = startX; x < stopX; x++, ptr += pixelSize )
{
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
BestCS.Imaging.HSL.FromRGB( rgb, hsl );
// modify hue value
hsl.Hue = hue;
// convert back to RGB
BestCS.Imaging.HSL.ToRGB( hsl, rgb );
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
ptr += offset;
}
}
// http://en.wikipedia.org/wiki/Tints_and_shades
public static IEnumerable<RGB> GetShades(RGB rgb, int count = 10)
{
HSL hsl = RGB2HSL(rgb);
RGB[] result = new RGB[count];
for (int i = 1; i <= count - 1; i++)
{
var H = hsl.Hue;
var S = hsl.Saturation;
var L = 255 * (float)(1 / i);
HSL temp = new HSL(H, S, L);
result[i] = HSL2RGB(temp);
}
return result;
}
/// <summary>
/// Process the filter on the specified image.
/// </summary>
///
/// <param name="image">Source image data.</param>
/// <param name="rect">Image rectangle for processing by the filter.</param>
///
protected override unsafe void ProcessFilter( UnmanagedImage image, Rectangle rect )
{
int pixelSize = Bitmap.GetPixelFormatSize( image.PixelFormat ) / 8;
int startX = rect.Left;
int startY = rect.Top;
int stopX = startX + rect.Width;
int stopY = startY + rect.Height;
int offset = image.Stride - rect.Width * pixelSize;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
float desaturationChangeFactor = 1.0f + adjustValue;
// do the job
byte* ptr = (byte*) image.ImageData.ToPointer( );
// allign pointer to the first pixel to process
ptr += ( startY * image.Stride + startX * pixelSize );
// for each row
for ( int y = startY; y < stopY; y++ )
{
// for each pixel
for ( int x = startX; x < stopX; x++, ptr += pixelSize )
{
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
Accord.Imaging.HSL.FromRGB( rgb, hsl );
if ( adjustValue > 0 )
{
hsl.Saturation += ( 1.0f - hsl.Saturation ) * adjustValue * hsl.Saturation;
}
else if ( adjustValue < 0 )
{
hsl.Saturation *= desaturationChangeFactor;
}
// convert back to RGB
Accord.Imaging.HSL.ToRGB(hsl, rgb);
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
ptr += offset;
}
}
// Process the filter
private unsafe void ProcessFilter( BitmapData data )
{
int width = data.Width;
int height = data.Height;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
int offset = data.Stride - width * 3;
// do the job
byte * ptr = (byte *) data.Scan0.ToPointer( );
// for each row
for ( int y = 0; y < height; y++ )
{
// for each pixel
for ( int x = 0; x < width; x++, ptr += 3 )
{
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
AForge.Imaging.ColorConverter.RGB2HSL( rgb, hsl );
// modify Hue value
hsl.Hue = hue;
// convert back to RGB
AForge.Imaging.ColorConverter.HSL2RGB( hsl, rgb );
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
ptr += offset;
}
}
public void Reset()
{
Background = new SolidColorBrush((Color)ColorConverter.ConvertFromString(GraphicsWindow.BackgroundColor));
foreground = new SolidColorBrush((Color)ColorConverter.ConvertFromString(GraphicsWindow.PenColor));
fontFamily = new FontFamily(GraphicsWindow.FontName);
fontSize = GraphicsWindow.FontSize;
fontWeight = GraphicsWindow.FontBold ? FontWeights.Bold : FontWeights.Normal;
fontStyle = GraphicsWindow.FontItalic ? FontStyles.Italic : FontStyles.Normal;
eStyle = Styles.PIE;
Values = new List<double>();
Labels = new List<string>();
Count = 0;
eLegend = Legends.LEGEND_PERCENT;
bLegendBackground = false;
legendScale = 1.0;
scale = 1.0;
hue = 0;
saturation = 0.5;
lightness = 0.5;
startColor = 0;
endColor = 1;
centralColour = "";
eHSL = HSL.HUE;
Update();
}
/// <summary>
/// Convert from RGB to HSL color space.
/// </summary>
///
/// <param name="rgb">Source color in <b>RGB</b> color space.</param>
///
/// <returns>Returns <see cref="HSL"/> instance, which represents converted color value.</returns>
///
public static HSL FromRGB(RGB rgb)
{
HSL hsl = new HSL();
FromRGB(rgb, hsl);
return hsl;
}
/// <summary>
/// Sets the absolute saturation level
/// </summary>
/// <remarks>Accepted values 0-1</remarks>
/// <param name="c">An original color</param>
/// <param name="Saturation">The saturation value to impose</param>
/// <returns>An adjusted color</returns>
public static Color SetSaturation(Color c, double Saturation)
{
HSL hsl = new HSL(c);
hsl.S = Saturation;
return hsl.GetColor();
}
/// <summary>
/// Sets the absolute Hue level
/// </summary>
/// <remarks>Accepted values 0-1</remarks>
/// <param name="c">An original color</param>
/// <param name="Hue">The Hue value to impose</param>
/// <returns>An adjusted color</returns>
public static Color SetHue(Color c, double Hue)
{
HSL hsl = new HSL(c);
hsl.H = Hue;
return hsl.GetColor();
}
// http://en.wikipedia.org/wiki/Weber%E2%80%93Fechner_law#The_case_of_vision
public static RGB GetContrast(RGB rgb)
{
var hsl = RGB2HSL(rgb);
hsl = new HSL((hsl.Hue + 180) % 360, hsl.Saturation, hsl.Lightness);
return HSL2RGB(hsl);
}
public static Color Convert(HSL hsl)
{
var rgb = new RGB();
if (hsl.S == 0M)
rgb.R = rgb.G = rgb.B = hsl.L;
else
rgb = GetRGBFromHSLWithChroma(hsl);
return rgb.ToColor();
}
private static RGB GetRGBFromHSLWithChroma(HSL hsl)
{
decimal min, max, h;
h = hsl.H / 360M;
max = hsl.L < 0.5M ? hsl.L * (1 + hsl.S) : (hsl.L + hsl.S) - (hsl.L * hsl.S);
min = (hsl.L * 2M) - max;
var rgb = new RGB();
rgb.R = ComponentFromHue(min, max, h + (1M / 3M));
rgb.G = ComponentFromHue(min, max, h);
rgb.B = ComponentFromHue(min, max, h - (1M / 3M));
return rgb;
}
// Process the filter
private unsafe void ProcessFilter( BitmapData data )
{
int width = data.Width;
int height = data.Height;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
int offset = data.Stride - width * 3;
double kl = 0, bl = 0;
double ks = 0, bs = 0;
// luminance line params
if ( inLuminance.Max != inLuminance.Min )
{
kl = ( outLuminance.Max - outLuminance.Min ) / ( inLuminance.Max - inLuminance.Min );
bl = outLuminance.Min - kl * inLuminance.Min;
}
// saturation line params
if ( inSaturation.Max != inSaturation.Min )
{
ks = ( outSaturation.Max - outSaturation.Min ) / ( inSaturation.Max - inSaturation.Min );
bs = outSaturation.Min - ks * inSaturation.Min;
}
// do the job
byte * ptr = (byte *) data.Scan0.ToPointer( );
// for each row
for ( int y = 0; y < height; y++ )
{
// for each pixel
for ( int x = 0; x < width; x++, ptr += 3 )
{
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
AForge.Imaging.ColorConverter.RGB2HSL( rgb, hsl );
// correct luminance
if ( hsl.Luminance >= inLuminance.Max )
hsl.Luminance = outLuminance.Max;
else if ( hsl.Luminance <= inLuminance.Min )
hsl.Luminance = outLuminance.Min;
else
hsl.Luminance = kl * hsl.Luminance + bl;
// correct saturation
if ( hsl.Saturation >= inSaturation.Max )
hsl.Saturation = outSaturation.Max;
else if ( hsl.Saturation <= inSaturation.Min )
hsl.Saturation = outSaturation.Min;
else
hsl.Saturation = ks * hsl.Saturation + bs;
// convert back to RGB
AForge.Imaging.ColorConverter.HSL2RGB( hsl, rgb );
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
ptr += offset;
}
}
/// <summary>
/// Convert from HSL to RGB color space.
/// </summary>
///
/// <param name="hsl">Source color in <b>HSL</b> color space.</param>
/// <param name="rgb">Destination color in <b>RGB</b> color space.</param>
///
public static void ToRGB(HSL hsl, RGB rgb)
{
if (hsl.Saturation == 0)
{
// gray values
rgb.Red = rgb.Green = rgb.Blue = (byte)(hsl.Luminance * 255);
}
else
{
float v1, v2;
float hue = (float)hsl.Hue / 360;
v2 = (hsl.Luminance < 0.5) ?
(hsl.Luminance * (1 + hsl.Saturation)) :
((hsl.Luminance + hsl.Saturation) - (hsl.Luminance * hsl.Saturation));
v1 = 2 * hsl.Luminance - v2;
rgb.Red = (byte)(255 * Hue_2_RGB(v1, v2, hue + (1.0f / 3)));
rgb.Green = (byte)(255 * Hue_2_RGB(v1, v2, hue));
rgb.Blue = (byte)(255 * Hue_2_RGB(v1, v2, hue - (1.0f / 3)));
rgb.Alpha = 255;
}
}
//Given HSL, returns RGB
private Color HSLtoRGB( HSL _hsl )
{
//default value
Color rgb = Color.green;
//number wizardry
//from http://www.rapidtables.com/convert/color/hsl-to-rgb.htm
float c = (1 - (Mathf.Abs(2*_hsl.l) - 1)) * _hsl.s,
x = c * ( 1 - Mathf.Abs (((_hsl.h/60)%2) - 1)),
m = _hsl.l - c/2;
//default value
Color rgbDelta = Color.black;
//To find what rgbDelta is, we need
if ( 0 <= _hsl.h && _hsl.h < 60 )
{
rgbDelta.r = c;
rgbDelta.g = x;
rgbDelta.b = 0;
}
else if ( 60 <= _hsl.h && _hsl.h < 120 )
{
rgbDelta.r = x;
rgbDelta.g = c;
rgbDelta.b = 0;
}
else if ( 120 <= _hsl.h && _hsl.h < 180 )
{
rgbDelta.r = 0;
rgbDelta.g = c;
rgbDelta.b = x;
}
else if ( 180 <= _hsl.h && _hsl.h < 240 )
{
rgbDelta.r = 0;
rgbDelta.g = x;
rgbDelta.b = c;
}
else if ( 240 <= _hsl.h && _hsl.h < 300 )
{
rgbDelta.r = x;
rgbDelta.g = 0;
rgbDelta.b = c;
}
else //300 <= _hsl.h && _hsl.h < 360
{
rgbDelta.r = c;
rgbDelta.g = 0;
rgbDelta.b = x;
}
rgb.r = rgbDelta.r + m;
rgb.g = rgbDelta.g + m;
rgb.b = rgbDelta.b + m;
return rgb;
}
/// <summary>
/// Convert from RGB to HSL color space.
/// </summary>
///
/// <param name="rgb">Source color in <b>RGB</b> color space.</param>
/// <param name="hsl">Destination color in <b>HSL</b> color space.</param>
///
/// <remarks><para>See <a href="http://en.wikipedia.org/wiki/HSI_color_space#Conversion_from_RGB_to_HSL_or_HSV">HSL and HSV Wiki</a>
/// for information about the algorithm to convert from RGB to HSL.</para></remarks>
///
public static void FromRGB(RGB rgb, HSL hsl)
{
float r = (rgb.Red / 255.0f);
float g = (rgb.Green / 255.0f);
float b = (rgb.Blue / 255.0f);
float min = Math.Min(Math.Min(r, g), b);
float max = Math.Max(Math.Max(r, g), b);
float delta = max - min;
// get luminance value
hsl.Luminance = (max + min) / 2;
if (delta == 0)
{
// gray color
hsl.Hue = 0;
hsl.Saturation = 0.0f;
}
else
{
// get saturation value
hsl.Saturation = (hsl.Luminance <= 0.5) ? (delta / (max + min)) : (delta / (2 - max - min));
// get hue value
float hue;
if (r == max)
{
hue = ((g - b) / 6) / delta;
}
else if (g == max)
{
hue = (1.0f / 3) + ((b - r) / 6) / delta;
}
else
{
hue = (2.0f / 3) + ((r - g) / 6) / delta;
}
// correct hue if needed
if (hue < 0)
hue += 1;
if (hue > 1)
hue -= 1;
hsl.Hue = (int)(hue * 360);
}
}
private void CustomDrawItem(ListBoxDrawItemEventArgs e)
{
double h = _customDrawingPosition / Convert.ToDouble(CustomDrawingPositionMaximum);
if(e.IsItemSelected)
{
h = Math.Abs(1.0 - h);
}
HSL backColor = new HSL(h,
1,
e.ItemIndex % 2 == 0 ? 0.5 : 0.6);
using(SolidBrush sb = new SolidBrush(backColor.ToRgb()))
{
e.Graphics.FillRectangle(sb, e.DrawingBounds);
}
HSL foreColor = new HSL(Math.Abs(1.0 - h),
1,
0.5);
using(SolidBrush sb = new SolidBrush(foreColor.ToRgb()))
e.Graphics.DrawString(DemoListBox.GetItemText(e.ItemIndex), DemoListBox.Font, sb, e.DrawingBounds);
}
/// <summary>
/// Process the filter on the specified image.
/// </summary>
///
/// <param name="image">Source image data.</param>
/// <param name="rect">Image rectangle for processing by the filter.</param>
///
protected override unsafe void ProcessFilter( UnmanagedImage image, Rectangle rect )
{
int pixelSize = Image.GetPixelFormatSize( image.PixelFormat ) / 8;
int startX = rect.Left;
int startY = rect.Top;
int stopX = startX + rect.Width;
int stopY = startY + rect.Height;
int offset = image.Stride - rect.Width * pixelSize;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
float kl = 0, bl = 0;
float ks = 0, bs = 0;
// luminance line parameters
if ( inLuminance.Max != inLuminance.Min )
{
kl = ( outLuminance.Max - outLuminance.Min ) / ( inLuminance.Max - inLuminance.Min );
bl = outLuminance.Min - kl * inLuminance.Min;
}
// saturation line parameters
if ( inSaturation.Max != inSaturation.Min )
{
ks = ( outSaturation.Max - outSaturation.Min ) / ( inSaturation.Max - inSaturation.Min );
bs = outSaturation.Min - ks * inSaturation.Min;
}
// do the job
byte* ptr = (byte*) image.ImageData.ToPointer( );
// allign pointer to the first pixel to process
ptr += ( startY * image.Stride + startX * pixelSize );
// for each row
for ( int y = startY; y < stopY; y++ )
{
// for each pixel
for ( int x = startX; x < stopX; x++, ptr += pixelSize )
{
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
Accord.Imaging.HSL.FromRGB(rgb, hsl);
// do luminance correction
if ( hsl.Luminance >= inLuminance.Max )
hsl.Luminance = outLuminance.Max;
else if ( hsl.Luminance <= inLuminance.Min )
hsl.Luminance = outLuminance.Min;
else
hsl.Luminance = kl * hsl.Luminance + bl;
// do saturation correct correction
if ( hsl.Saturation >= inSaturation.Max )
hsl.Saturation = outSaturation.Max;
else if ( hsl.Saturation <= inSaturation.Min )
hsl.Saturation = outSaturation.Min;
else
hsl.Saturation = ks * hsl.Saturation + bs;
// convert back to RGB
Accord.Imaging.HSL.ToRGB( hsl, rgb );
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
ptr += offset;
}
}
public static RGB HSL2RGB(HSL hsl)
{
if (hsl.Saturation == 0)
{
return new RGB(hsl.Lightness, hsl.Lightness, hsl.Lightness);
}
else
{
double H = hsl.Hue / 360;
double S = hsl.Saturation / 255;
double L = hsl.Lightness / 255;
double valueA;
if (L < .5) { valueA = L * (1 + S); }
else { valueA = (L + S) - (S * L); }
double valueB = 2 * L - valueA;
Func<double, double, double, float> hueToRGB = (valA, valB, Hue) =>
{
if (Hue < 0)
Hue += 1;
if (Hue > 1)
Hue -= 1;
if (6 * Hue < 1)
return (float)(valA + (valB - valA) * 6 * Hue);
if (2 * Hue < 1)
return (float)valB;
if (3 * Hue < 2)
return (float)(valA + (valB - valA) * ((2 / 3) - Hue) * 6);
return (float)valA;
};
float R = 255f * hueToRGB(valueB, valueA, H + 1 / 3);
float G = 255f * hueToRGB(valueB, valueA, H);
float B = 255f * hueToRGB(valueB, valueA, H - 1 / 3);
return new RGB(R, G, B);
}
}
/// <summary>
/// Modifies an existing Hue level
/// </summary>
/// <remarks>
/// To reduce Hue use a number smaller than 1. To increase Hue use a number larger than 1
/// </remarks>
/// <param name="c">The original color</param>
/// <param name="Hue">The Hue delta</param>
/// <returns>An adjusted color</returns>
public static Color ModifyHue(Color c, double Hue)
{
HSL hsl = new HSL(c);
hsl.H *= Hue;
return hsl.GetColor();
}
/// <summary>
/// Sets the absolute brightness of a color
/// </summary>
/// <param name="c">Original color</param>
/// <param name="brightness">The luminance level to impose</param>
/// <returns>an adjusted color</returns>
public static Color SetBrightness(Color c, double brightness)
{
HSL hsl = new HSL(c);
hsl.L = brightness;
return hsl.GetColor();
}
/// <summary>
/// Process the filter on the specified image.
/// </summary>
///
/// <param name="image">Source image data.</param>
/// <param name="rect">Image rectangle for processing by the filter.</param>
///
protected override unsafe void ProcessFilter( UnmanagedImage image, Rectangle rect )
{
// get pixel size
int pixelSize = ( image.PixelFormat == PixelFormat.Format24bppRgb ) ? 3 : 4;
int startX = rect.Left;
int startY = rect.Top;
int stopX = startX + rect.Width;
int stopY = startY + rect.Height;
int offset = image.Stride - rect.Width * pixelSize;
RGB rgb = new RGB( );
HSL hsl = new HSL( );
bool updated;
// do the job
byte* ptr = (byte*) image.ImageData.ToPointer( );
// allign pointer to the first pixel to process
ptr += ( startY * image.Stride + startX * pixelSize );
// for each row
for ( int y = startY; y < stopY; y++ )
{
// for each pixel
for ( int x = startX; x < stopX; x++, ptr += pixelSize )
{
updated = false;
rgb.Red = ptr[RGB.R];
rgb.Green = ptr[RGB.G];
rgb.Blue = ptr[RGB.B];
// convert to HSL
AForge.Imaging.HSL.FromRGB( rgb, hsl );
// check HSL values
if (
( hsl.Saturation >= saturation.Min ) && ( hsl.Saturation <= saturation.Max ) &&
( hsl.Luminance >= luminance.Min ) && ( hsl.Luminance <= luminance.Max ) &&
(
( ( hue.Min < hue.Max ) && ( hsl.Hue >= hue.Min ) && ( hsl.Hue <= hue.Max ) ) ||
( ( hue.Min > hue.Max ) && ( ( hsl.Hue >= hue.Min ) || ( hsl.Hue <= hue.Max ) ) )
)
)
{
if ( !fillOutsideRange )
{
if ( updateH ) hsl.Hue = fillH;
if ( updateS ) hsl.Saturation = fillS;
if ( updateL ) hsl.Luminance = fillL;
updated = true;
}
}
else
{
if ( fillOutsideRange )
{
if ( updateH ) hsl.Hue = fillH;
if ( updateS ) hsl.Saturation = fillS;
if ( updateL ) hsl.Luminance = fillL;
updated = true;
}
}
if ( updated )
{
// convert back to RGB
AForge.Imaging.HSL.ToRGB( hsl, rgb );
ptr[RGB.R] = rgb.Red;
ptr[RGB.G] = rgb.Green;
ptr[RGB.B] = rgb.Blue;
}
}
ptr += offset;
}
}
/// <summary>
/// Converts RGB to HSL
/// </summary>
/// <remarks>Takes advantage of whats already built in to .NET by using the Color.GetHue, Color.GetSaturation and Color.GetBrightness methods</remarks>
/// <param name="c">A Color to convert</param>
/// <returns>An HSL value</returns>
public static HSL RGB_to_HSL(Color c)
{
HSL hsl = new HSL {H = (c.GetHue()/360.0), L = c.GetBrightness(), S = c.GetSaturation()};
return hsl;
}
/// <summary>
/// Converts RGB to HSL
/// </summary>
/// <remarks>Takes advantage of whats already built in to .NET by using the Color.GetHue, Color.GetSaturation and Color.GetBrightness methods</remarks>
/// <param name="c">A Color to convert</param>
/// <returns>An HSL value</returns>
public static HSL RGB_to_HSL(Color c)
{
HSL hsl = new HSL();
int Max, Min, Diff;
// Of our RGB values, assign the highest value to Max, and the Smallest to Min
if ( c.R > c.G ) { Max = c.R; Min = c.G; }
else { Max = c.G; Min = c.R; }
if ( c.B > Max ) Max = c.B;
else if ( c.B < Min ) Min = c.B;
Diff = Max - Min;
// Luminance - a.k.a. Brightness - Adobe photoshop uses the logic that the
// site VBspeed regards (regarded) as too primitive = superior decides the
// level of brightness.
hsl.L = (double)Max/255;
// Saturation
if ( Max == 0 ) hsl.S = 0; // Protecting from the impossible operation of division by zero.
else hsl.S = (double)Diff/Max; // The logic of Adobe Photoshops is this simple.
// Hue R is situated at the angel of 360 eller noll degrees;
// G vid 120 degrees
// B vid 240 degrees
double q;
if ( Diff == 0 ) q = 0; // Protecting from the impossible operation of division by zero.
else q = (double)60/Diff;
if ( Max == c.R )
{
if ( c.G < c.B ) hsl.H = (double)(360 + q * (c.G - c.B))/360;
else hsl.H = (double)(q * (c.G - c.B))/360;
}
else if ( Max == c.G ) hsl.H = (double)(120 + q * (c.B - c.R))/360;
else if ( Max == c.B ) hsl.H = (double)(240 + q * (c.R - c.G))/360;
else hsl.H = 0.0;
return hsl;
}
public static HSL Convert(Color color)
{
var hsl = new HSL();
var rgb = GetRGBFromColor(color);
var max = Math.Max(Math.Max(rgb.R, rgb.G), rgb.B);
var min = Math.Min(Math.Min(rgb.R, rgb.G), rgb.B);
var chroma = max - min;
hsl.L = GetL(max, min);
if (chroma != 0)
{
hsl.H = GetH(rgb, max, chroma);
hsl.S = GetS(hsl.L, chroma);
}
return hsl;
}
