ใน button3_click ครับ จะเขียนโคดเพื่อ save image from webcam จะ save image ที่ เป็น HSV
------------------------------------------------------------------------------------------
namespace ...
{
    public partial class Form1 : Form
    {

        Emgu.CV.Capture capture;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            timer1.Start();
        }

        private void button2_Click(object sender, EventArgs e)
        {
            timer1.Stop();
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            process();
        }
        private void process()
        {
        Image<Bgr, Byte> cameraImage;
        cameraImage = capture.QueryFrame();
        Image<Hsv, Byte> hsvImage = cameraImage.Convert<Hsv, Byte>); //Convert RGB > HSV.
      
        pictureBox1.Image = cameraImage.ToBitmap();
        CvInvoke.cvShowImage("RGB to HSV", hsvImage);

        //Create result image.
          
        Image<Gray, Byte> ResultImage = new Image<Gray, Byte>hsvImage.Width, hsvImage.Height);
        //Define low range(16).
        Image<Gray, Byte> IlowCh0 = new Image<Gray, Byte>hsvImage.Width, hsvImage.Height, new Gray(50));
        //Define hight range(30).
        Image<Gray, Byte> IHiCh0 = new Image<Gray, Byte>hsvImage.Width, hsvImage.Height, new Gray(80));
        //Use cvinrange() method and hsvImage[0] = hsvimage channel 0
        CvInvoke.cvInRange(hsvImage[0], IlowCh0, IHiCh0, ResultImage);
        CvInvoke.cvErode(ResultImage, ResultImage, (IntPtr)null, 2);  //Noise reduce.
        Image<Gray, Byte> imgForContour = new Image<Gray, byte>ResultImage.Width, ResultImage.Height);
        CvInvoke.cvCopy(ResultImage, imgForContour, System.IntPtr.Zero); //Copy image for contoure
        CvInvoke.cvShowImage("RGB to HSV", imgForContour );
      
      
        }


        private void Form1_Load(object sender, EventArgs e)
        {
           capture = new Emgu.CV.Capture();      
        }

        private void button3_Click(object sender, EventArgs e)
        {
          
          
        }  
    }
}
######################################################################