how do you track the X and Y Coordinates of a Rectangle on a bitmap in c#

Question

static readonly CascadeClassifier cascadeClassifier = new CascadeClassifier("haarcascade_frontalface_alt_tree.xml");

    void Device_NewFrame(object sender, NewFrameEventArgs eventArgs)
    {
        Bitmap bitmap = (Bitmap)eventArgs.Frame.Clone();
        Image<Bgr, byte> grayImage = new Image<Bgr, byte>(bitmap);
        Rectangle[] rectangles = cascadeClassifier.DetectMultiScale(grayImage, 1.2, 1);
        foreach (Rectangle rect in rectangles)
        {
            using (Graphics graphics = Graphics.FromImage(bitmap))
            {
                using (Pen pen = new Pen(Color.Red, 5))
                {
                    graphics.DrawRectangle(pen, rect);
                }

            }
        }
        bitmap.RotateFlip(RotateFlipType.RotateNoneFlipX);
        webcamDetection.Image = bitmap;
    }

so this is the code i am using my question how do i get the x and y values of the red rectangle so i can send those values to an arduino and set servos as such. I can provide more information, hope someone can help me out.

Answer 1

If you know the rectangle you can check the documentation to see the available properties. You would typically use rect.X , rect.Y , rect.Width , and rect.Height .