AForge，ColorTracking多个对象

Question

我目前正在我的WebCam上通过颜色跟踪对象，我已经走到了这一步，但我想添加一个选项来绘制多个对象。到目前为止，它只在最大的对象周围绘制一个矩形。

BlobCounter blobcounter = new BlobCounter();
blobcounter.MinHeight = 100;
blobcounter.MinWidth = 100;
blobcounter.ObjectsOrder = ObjectsOrder.Size;
blobcounter.ProcessImage(grayImage);
Rectangle[] rects = blobcounter.GetObjectsRectangles();

if (checkBox1.Checked == false)
{
    if (rects.Length > 0)
    {
        Rectangle objectRect1 = rects[0];
        Graphics g = Graphics.FromImage(video);
        using (Pen pen = new Pen(Color.LightGreen, 3))
        {
            g.DrawRectangle(pen, objectRect1);
            PointF drawPoin = new PointF(objectRect1.X, objectRect1.Y);
            int objectX = objectRect1.X + objectRect1.Width / 2 - video.Width / 2;
            int objectY = video.Height / 2 - (objectRect1.Y + objectRect1.Height / 2);
            PointF drawPoin2 = new PointF(objectRect1.X, objectRect1.Y + objectRect1.Height + 4);
            String Blobinformation = "X= " + objectX.ToString() + "  Y= " + objectY.ToString() + "\nSize=" + objectRect1.Width + ", " + objectRect1.Height;
            g.DrawString(Blobinformation, new Font("Arial", 12), new SolidBrush(Color.LightSkyBlue), drawPoin2);
        }
        g.Dispose();
    }
}
else
{
 ??????????
}

Answer 1

添加一个简单的foreach循环应该就足够了。我不知道绘图的效率有多高，但我几乎可以肯定几个矩形不会有问题。

else
{
    if (rects.Length > 0)
    {
        foreach (Rectangle objectRect in rects)
        {
            Graphics g = Graphics.FromImage(video);
            using (Pen pen = new Pen(Color.LightGreen, 3))
            {
                g.DrawRectangle(pen, objectRect);
                PointF drawPoin = new PointF(objectRect.X, objectRect.Y);
                int objectX = objectRect.X + objectRect.Width / 2 - video.Width / 2;
                int objectY = video.Height / 2 - (objectRect.Y + objectRect.Height / 2);
                PointF drawPoin2 = new PointF(objectRect.X, objectRect.Y + objectRect.Height + 4);
                String Blobinformation = "X= " + objectX.ToString() + "  Y= " + objectY.ToString() + "\nSize=" + objectRect.Width + ", " + objectRect.Height;
                g.DrawString(Blobinformation, new Font("Arial", 12), new SolidBrush(Color.LightSkyBlue), drawPoin2);
            }
            g.Dispose();
        }
    }
}