My Pi is not Rasbian Pi and the resolution doesn't matter,if it's 1920*1080,just set the scale number higher.
I tried the code today and it did work ,but I did not autostart it on boot up because I do not know how to
(but it's easy , i think,on linux).
Just add the two line of code in the seek_viewer.cpp and rebuild/make/install it.
My seek pro is not here,so I tried seek XR instead ,they are the same ,I use:
seek_viewer -t seek -r 0 -s 3.8 -F seek_ffc.png
-s: scale number
and i get it in full-screen.
EDIT:
The code is:
namedWindow("SeekThermal");
cvMoveWindow("SeekThermal",0,0);