public DominantColor()
{
Clusters = new CentroidColor[4]
{
new CentroidColor(60, 60, 60), //grays
new CentroidColor(180, 60, 60), //r
new CentroidColor(60, 180, 60), //g
new CentroidColor(60, 60, 180), //b
};
}
protected override void Implementation()
{
byte r, g, b;
int key, i = 0, ix = bufferIndex;
byte[] color = null;
CentroidColor target = null;
var groups = new Dictionary <int, List <byte[]> >();
Reset();
while (i < end)
{
color = new byte[3]
{
r = buffer[ix + 2],
g = buffer[ix + 1],
b = buffer[ix]
};
if (isGray(r, g, b))
{
Clusters[0].members.Add(color);
}
else
{
key = (int)r << 16 | (int)g << 8 | (int)b;
if (groups.ContainsKey(key))
{
groups[key].Add(color);
}
else
{
groups.Add(key, new List <byte[]>()
{
color
});
}
}
ix += 4;
if (++i % width == 0)
{
ix += padding;
}
}
Clusters[0].Recenter();
//build clusters
r = 4;
do
{
foreach (var k in groups.Values)
{
color = k[0];
for (i = startCluster, key = int.MaxValue; i < Clusters.Length; i++)
{
ix = euclidDistance(Clusters[i].mean, color);
if (ix < key)
{
key = ix;
target = Clusters[i];
}
}
target.members.AddRange(k);
}
}while(Recenter() && --r > 0);
//get 1, 2 dominant clusters
for (g = startCluster, r = 0, b = 0, key = 0, ix = Clusters.Length; g < ix; g++)
{
i = Clusters[g].memberCount;
if (i == 0)
{
continue;
}
if (i > key)
{
r = b;
b = g;
key = Clusters[b].memberCount;
}
}
color = Clusters[b].mean;
//reduce flicker for dominance rivalry
/*if(r != 0 && (Math.Abs(init.Ks[r].memberCount - g) < 40 || init.Ks[r].memberCount + g < width * height / 2)) {
* init.Ks[r].mean[0] = (mean[0] + init.Ks[r].mean[0]) / 2;
* init.Ks[r].mean[1] = (mean[1] + init.Ks[r].mean[1]) / 2;
* init.Ks[r].mean[2] = (mean[2] + init.Ks[r].mean[2]) / 2;
* mean[0] = init.Ks[r].mean[0];
* mean[1] = init.Ks[r].mean[1];
* mean[2] = init.Ks[r].mean[2];
* }
*/
//integrate gray cluster at 1/3 weight
//mean[0] = (mean[0] * 2 + init.Ks[0].mean[0]) / 3;
//mean[1] = (mean[1] * 2 + init.Ks[0].mean[1]) / 3;
//mean[2] = (mean[2] * 2 + init.Ks[0].mean[2]) / 3;
mean[0] = color[0];
mean[1] = color[1];
mean[2] = color[2];
}
