private void Redo() { Guid cardId = Guid.Parse("014F3226-9CB7-4A7F-9C98-6821BADB6033"); string fileName = string.Format(@"C:\Temp\cards\{0}.bmp", cardId); using (Mat titleImage = new Mat(fileName, LoadImageType.Color)) { var image = new CardImaging.Image(titleImage); CannyParam cannyParam = new CannyParam(trackBar1.Value, trackBar2.Value, false, 5); using (var contouredImage = image.GetContouredImage(angle: 0, cannyParameter: cannyParam)) { if (pictureBox9.Image != null) { pictureBox9.Image.Dispose(); } pictureBox9.Image = (Bitmap)contouredImage.Bitmap.Clone(); pictureBox9.Update(); } } }