/// <summary>
/// Forward-only blob search
/// </summary>
private PixelBlob FindBlob(PixelData data)
{
PixelBlob blob = null;
PixelBlob currentBlob = null;
PixelDataList pixels = null;
bool isNeighbor = false;
for (int b = this.Blobs.Count - 1; b >= 0 && blob == null; b--)
{
currentBlob = this.Blobs[b];
pixels = null;
isNeighbor = false;
if (currentBlob.Pixels.Count > 0)
{
pixels = currentBlob.Pixels[currentBlob.Pixels.Count - 1];
// Same Y-Index as the current pixel
if (pixels.Y == data.Y)
{
if (Math.Abs(pixels[pixels.Count - 1].X - data.X) <= 1)
{
isNeighbor = true;
}
}
// Previous Y-index as the current pixel
else if (pixels.Y == (data.Y - 1))
{
// Iterate through the y position
for (int x = 0; x < pixels.Count && !isNeighbor; x++)
{
if (Math.Abs(pixels[x].X - data.X) == 0)
{
isNeighbor = true;
}
}
}
// If the current blob neighbors the current pixel. Check the threshold
if (isNeighbor && Math.Abs(data.Red - currentBlob.AverageR) <= this.ToleranceR && Math.Abs(data.Green - currentBlob.AverageG) <= this.ToleranceG && Math.Abs(data.Blue - currentBlob.AverageB) <= this.ToleranceB)
{
blob = currentBlob;
}
}
}
return(blob);
}
public void AddPixel(PixelData data)
{
// Add to pixels
if (this.Pixels.Count == 0 || this.Pixels[this.Pixels.Count - 1].Y != data.Y)
{
PixelDataList yData = new PixelDataList();
yData.Y = data.Y;
this.Pixels.Add(yData);
}
this.Pixels[this.Pixels.Count - 1].Add(data);
// Backwards blob reference for the pixel
data.Blob = this;
this._staticCount++;
this._totalR += data.Red;
this._totalG += data.Green;
this._totalB += data.Blue;
// Check for new blob x range
if (this.XMin > data.X)
{
this._xMin = data.X;
}
else if (this.XMax < data.X)
{
this._xMax = data.X;
}
// Check for new blob y range
if (this.YMin > data.Y)
{
this._yMin = data.Y;
}
else if (this.YMax < data.Y)
{
this._yMax = data.Y;
}
}
