问如何使用Aforge.Net计算blob中已连接组件的数量

EN

FiltersSequence preOcr = new FiltersSequence(
    Grayscale.CommonAlgorithms.BT709, 
    new BradleyLocalThresholding());

Bitmap grayscale = preOcr.Apply(original);
var labels = new ConnectedComponentsLabeling();
labels.Apply(new Invert().Apply(grayscale));

//Console.WriteLine(labels.ObjectCount);    // Here you go
foreach (var candidate in labels.BlobCounter.GetObjectsInformation())
{
    using (Bitmap symbol = new Bitmap(candidate.Rectangle.Width, 
                                      candidate.Rectangle.Height))
    using (Graphics g2 = Graphics.FromImage(symbol))
    {
        g2.DrawImage(grayscale, 0, 0, candidate.Rectangle, GraphicsUnit.Pixel);
        symbol.Save(String.Format(@"temp\{0}-{1}.jpg",i,++n), ImageFormat.Jpeg);
        // do stuff
    }
}