Yep, happens to me all the time. It's mostly faces of people I have never met (or can't remember) and sometimes random objects or landscapes.
I don't feel like I really see them, it's more like I remember that they were there a split second ago. The image I remember is always very dark, usually grey tones and sometimes sepia.

They don't evoke any feeling is me, they are just there and don't bother me at all.