Spelling tip: English is "title", not "Titel". Unless you type as badly as I do, then who knows what order the letters will come out in?
Oh, well, it's "centre" in UK and "center" in US, so logic isn't our strong point.
I'm not totally sure I understood the question, but it appears that the Primefaces supports a QR code with embedded image using the "image strip" or "image box" options but only if you use canvas rendering. Anything fancier and you'd probably have to either generate the QR code on the server as an image and use server-side logic to merge with whatever bitmap graphics you'd want. Or, alternatively, maybe do some z-axis stacking with CSS on the client side.
And while I'm being all pedantic,
JSF backing bean classes are
NOT Controllers, no matter what PrimeFaces and NetBeans may say. They are
Models. In JSF, the Controllers are part of the bean tag processors (and the FacesServlet). You don't write your own Controllers, only Models and Views.