Contour Analysis for Image Recognition in C#

/// <summary>
   /// Main form to interact with EmguCV for contour processing.
   /// </summary>
   public partial class frmContours : Form
   {
       Emgu.CV.Capture c;
       FindContours processor = new FindContours();
       Bitmap colorImage;

       /// <summary>
       /// Initializes the initial tracker value to th tracker label.
       /// </summary>
       public frmContours()
       {
           InitializeComponent();
           lblThresholdValue.Text = trackbarThreshold.Value.ToString();
       }

       /// <summary>
       /// Updates the threshold label when the tracker changes.
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
       private void trackbarThreshold_Scroll(object sender, EventArgs e)
       {
           lblThresholdValue.Text = trackbarThreshold.Value.ToString();
       }

       /// <summary>
       /// Starts the camera capture.
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
       private void btnCapture_Click(object sender, EventArgs e)
       {
           if (c == null)
           {
               c = new Emgu.CV.Capture();
           }
           CameraStreamCapture.Enabled = true;

       }

       /// <summary>
       /// Stops the Camera capture.
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
       private void btnStopCapture_Click(object sender, EventArgs e)
       {
           CameraStreamCapture.Enabled = false;
           if (c != null)
           {
               c.Dispose();
               c = null;
           }

       }
       /// <summary>
       /// Start capturing from the camera stream.
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
       private void CameraStreamCapture_Tick(object sender, EventArgs e)
       {
           colorImage = c.QueryFrame().ToBitmap();
           Bitmap color;
           Bitmap gray;
           processor.IdentifyContours(colorImage, trackbarThreshold.Value, chkBoxInvert.Checked, out gray, out color);
           pictBoxColor.Image = color;
           pictBoxGray.Image = gray;
       }

       /// <summary>
       /// Stop the camera and release resources when the form is closing
       /// </summary>
       /// <param name="sender"></param>
       /// <param name="e"></param>
       private void frmContours_FormClosing(object sender, FormClosingEventArgs e)
       {
           CameraStreamCapture.Enabled = false;
           c = null;
       }
   }