Answer 1

Answer 2

其他解决方案;

 Bitmap bmp = new Bitmap(pictureBox1.Image);
        int width = bmp.Width;
        int height = bmp.Height;
        for (int x = 0; x < bmp.Width; x++)
        {
            for (int y = 0; y < bmp.Height; y++)
            {
                Color color = bmp.GetPixel(x, y);

                if (color.R == 0)
                {
                    textBox4.Text = x.ToString();
                    textBox5.Text = y.ToString();
                    return; //Starting Point.If canceled endpoint.
                }