C#存图片

一个WinForm，有一个按钮，点击下，弹出一个文件对话框和另一个Winform，
    private void Col_Click(object sender, EventArgs e)//添加模板按钮
        {
            string str = InputBox.ShowInputBox("输入模板名", string.Empty);//
            if (str.Trim() != string.Empty)
            {
                int i = 0;
                persondata.Add(new person(str));
                int j = persondata.Count - 1;
                Form2 frm = new Form2();
                frm.Show();
                frm.Text = str;
                
                OpenFileDialog ofd = new OpenFileDialog();
                //ofd.Multiselect = true;
                if (ofd.ShowDialog() == DialogResult.OK)
                {                    bmp = (Bitmap)Image.FromStream(GetImgStream(ofd.FileName));
                    image = new Emgu.CV.Image<Bgr, Byte>(bmp);
                    sbmp = new Bitmap(128, 128, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
                    norm = new Emgu.CV.Image<Gray, Byte>(sbmp);
                    int x = HJFace.FaceLocated(image.Ptr, norm.Ptr, persondata[j].Pfeature[0], 0);
                    isface.Text = x.ToString();
                    if (x == 0)
                    {
                        sbmp = IplImagePointerToBitmap(norm.Ptr);
                    }
                    else
                    {
                        pictureBox1.Image = null;
                    }
                }
            }
            
        }
如何把图片存到Form2中,有好想法的请提供，高手赐教