private static ColorRgb888 GetClosestColor(ColorRgb888 col, int depth)
{
int invDepth = 8 - depth;
return(new ColorRgb888
{
R = (byte)((col.R >> invDepth) << invDepth),
G = (byte)((col.G >> invDepth) << invDepth),
B = (byte)((col.B >> invDepth) << invDepth),
});
}
private static Dictionary <ColorRgb888, Bucket <ColorRgb888> > GenBuckets(byte[] bgrData, int colorDepth)
{
var graph = new Dictionary <ColorRgb888, Bucket <ColorRgb888> >();
for (var i = 0; i < bgrData.Length; i += 3)
{
var c = new ColorRgb888
{
B = bgrData[i + 0],
G = bgrData[i + 1],
R = bgrData[i + 2],
};
var d = GetClosestColor(c, colorDepth);
if (!graph.ContainsKey(d))
{
graph[d] = new Bucket <ColorRgb888>();
}
graph[d].Elements.Add(c);
}
return(graph);
}
private static void ToHsl(this ColorRgb888 rgb, out double h, out double s, out double l)
{
const double EPSILON = 1.0 / 255;
var r = EPSILON * rgb.R;
var g = EPSILON * rgb.G;
var b = EPSILON * rgb.B;
var max = Math.Max(Math.Max(r, g), b);
var min = Math.Min(Math.Min(r, g), b);
var chroma = max - min;
double h1;
if (Math.Abs(chroma) < EPSILON)
{
h1 = 0;
}
else if (Math.Abs(max - r) < EPSILON)
{
h1 = ((g - b) / chroma) % 6;
}
else if (Math.Abs(max - g) < EPSILON)
{
h1 = 2 + (b - r) / chroma;
}
else //if (max == b)
{
h1 = 4 + (r - g) / chroma;
}
var lightness = 0.5 * (max - min);
var saturation = Math.Abs(chroma) < EPSILON
? 0
: chroma / (1 - Math.Abs(2 * lightness - 1));
h = 60 * h1;
s = saturation;
l = lightness;
}
public bool Equals(ColorRgb888 other)
{
return R == other.R && G == other.G && B == other.B;
}
private static ColorRgb888 GetClosestColor(ColorRgb888 col, int depth)
{
int invDepth = 8 - depth;
return new ColorRgb888
{
R = (byte) ((col.R >> invDepth) << invDepth),
G = (byte) ((col.G >> invDepth) << invDepth),
B = (byte) ((col.B >> invDepth) << invDepth),
};
}
private static Dictionary<ColorRgb888, Bucket<ColorRgb888>> GenBuckets(byte[] bgrData, int colorDepth)
{
var graph = new Dictionary<ColorRgb888, Bucket<ColorRgb888>>();
for (var i = 0; i < bgrData.Length; i += 3)
{
var c = new ColorRgb888
{
B = bgrData[i + 0],
G = bgrData[i + 1],
R = bgrData[i + 2],
};
var d = GetClosestColor(c, colorDepth);
if (!graph.ContainsKey(d))
graph[d] = new Bucket<ColorRgb888>();
graph[d].Elements.Add(c);
}
return graph;
}
public bool Equals(ColorRgb888 other)
{
return(R == other.R && G == other.G && B == other.B);
}