How do I print an image with a thermal printer in WPF

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WPF

printing

C#7.0

Hi, I want to print an image through an IPI Thermal Printer.

What I have tried:

I used a canvas control to arrange the information that i want printed on the paper and i captured the canvas control and converted to an image source using the code below

//get the canvas as image source
                Canvas ck = new Canvas();
                Rect rect = new Rect(canvas.RenderSize);
                RenderTargetBitmap rtb = new RenderTargetBitmap((int)canvas.RenderSize.Width * 2, (int)canvas.RenderSize.Height * 2, 96d, 96d, System.Windows.Media.PixelFormats.Default);
                rtb.Render(canvas);

                //endcode as PNG
                BitmapEncoder pngEncoder = new PngBitmapEncoder();
                pngEncoder.Frames.Add(BitmapFrame.Create(rtb));

                //save to memory stream
                System.IO.MemoryStream ms = new System.IO.MemoryStream();
                pngEncoder.Save(ms);

                var imageSource = new BitmapImage();
                imageSource.BeginInit();
                imageSource.StreamSource = ms;
                imageSource.EndInit();

i instantiated the printdialog and passed the image to it using the following code

//print
                System.Windows.Controls.PrintDialog dlg = new System.Windows.Controls.PrintDialog();

                if (dlg.ShowDialog() == true)
                {
                    System.Windows.Size printSize = new
                    System.Windows.Size(dlg.PrintableAreaWidth, dlg.PrintableAreaHeight);

                    System.Windows.Controls.Image img = new System.Windows.Controls.Image();

                    img.Source = imageSource;
                    img.Stretch = Stretch.UniformToFill;
                    img.Margin = new Thickness(48);

                    dlg.PrintVisual(img, "Account Opening Details");
                }

this opens the printdialog box but does not start the printer after i click print. like the printer does not spool or run. I printed a test page on the printer and it worked. It printed fine. So i instantiated a print document like this

PrintDocument dd = new PrintDocument();

but how do i pass the image to the print document before calling the

dd.Print()

function?