//---------------------------------------------------
public UnsafeBitmapEnumerator(UnsafeBitmap fastBitmap)
{
fastBitmap.LockBitmap();
locked = true;
this.fastBitmap = fastBitmap;
x = -1;
y = 0;
pCurrentPixel = fastBitmap[x, y];
}
public void Iterate()
{
_colourClusterAllocation = new Hashtable(); //for keeping track of colour<->cluster allocation
_pixelDataClusterAllocation = new Hashtable();
_clusterColours = new Hashtable();
UnsafeBitmap fastBitmap = new UnsafeBitmap(_image);
fastBitmap.LockBitmap();
Point size = fastBitmap.Size;
BGRA *pPixel;
for (int y = 0; y < size.Y; y++)
{
pPixel = fastBitmap[0, y];
for (int x = 0; x < size.X; x++)
{
PixelData pd = Colour.GetPixelData(pPixel, _model);
AllocateToCluster(pd);
//increment the pointer
pPixel++;
}
}
fastBitmap.UnlockBitmap();
CalculateClusterCentroids();
_processedImage = (Bitmap)_image.Clone();
//segment the image based on the cluster
fastBitmap = new UnsafeBitmap(_processedImage);
fastBitmap.LockBitmap();
for (int y = 0; y < size.Y; y++)
{
pPixel = fastBitmap[0, y];
for (int x = 0; x < size.X; x++)
{
PixelData pd = Colour.GetPixelData(pPixel, _model);
Color newClr = (Color)_clusterColours[pd.Name];
pPixel->red = newClr.R;
pPixel->green = newClr.G;
pPixel->blue = newClr.B;
//increment the pointer
pPixel++;
}
}
fastBitmap.UnlockBitmap();
CheckConvergence();
}
private void FindTopXColours(int numColours)
{
Dictionary <string, ColourCount> colours = new Dictionary <string, ColourCount>();
UnsafeBitmap fastBitmap = new UnsafeBitmap(_image);
fastBitmap.LockBitmap();
Point size = fastBitmap.Size;
BGRA *pPixel;
for (int y = 0; y < size.Y; y++)
{
pPixel = fastBitmap[0, y];
for (int x = 0; x < size.X; x++)
{
//get the bin index for the current pixel colour
Color clr = Color.FromArgb(pPixel->red, pPixel->green, pPixel->blue);
if (colours.ContainsKey(clr.Name))
{
((ColourCount)colours[clr.Name]).Count++;
}
else
{
colours.Add(clr.Name, new ColourCount(clr, 1));
}
//increment the pointer
pPixel++;
}
}
fastBitmap.UnlockBitmap();
//instantiate using actual colours found - which might be less than numColours
if (colours.Count < numColours)
{
numColours = colours.Count;
}
_topColours = new Color[numColours];
List <KeyValuePair <string, ColourCount> > summaryList = new List <KeyValuePair <string, ColourCount> >();
summaryList.AddRange(colours);
summaryList.Sort(delegate(KeyValuePair <string, ColourCount> kvp1, KeyValuePair <string, ColourCount> kvp2)
{ return(Comparer <int> .Default.Compare(kvp2.Value.Count, kvp1.Value.Count)); });
for (int i = 0; i < _topColours.Length; i++)
{
_topColours[i] = Color.FromArgb(summaryList[i].Value.Colour.R, summaryList[i].Value.Colour.G, summaryList[i].Value.Colour.B);
}
}