Appropriate salutation for female German full professor
The closest to the picture you are showing is 

"Professorin Dr. Johanna Schmidt"

where the "Dr." needs to be replaced by the correct specification, e.g. Dr.-Ing., Dr. rer nat, ...

If you are having less space, you can use "Prof." instead of "Professorin" (note that "Professorin" is the female form of "Professor")

If the real title is a PhD and not a "Dr.", you should write

"Professorin Johanna Schmidt, PhD"

In all cases, the first name might be abbreviated. In Germany it is relatively uncommon to use the second name - you should check how she uses it and follow the style she prefers. 

I would not write "Professorin" underneath the name - it looks strange to me.