for (int i = 0; i < 2; i++)
        {
            string path = @"D:\photos\";
            string fileN = path + i.ToString() + ".bmp";
            ImageList.Add(new Image<Bgr, Byte>(fileN));
        }

        try
        {
            using (Stitcher stitcher = new Stitcher(false))
            {
                using (VectorOfMat vm = new VectorOfMat())
                {
                    Mat result = new Mat();
                    vm.Push(ImageList);
                    stitcher.Stitch(vm, result);
                    pictureBox1.Image = result.ToImage<Bgr, byte>().Bitmap;
                }
            }
        }

        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }