There have been some absolutely stunning, iconic and emotive photos on Reflector lately. Members here put my own point-and-click efforts to shame.
Does the software behind reflector allow voting for individual included/inline photos, as currently enabled for entire posts?
And then maybe a quarterly or annual summary of the most voted-for pictures?
(because you web admins have nothing better to do with your time!)
I use a forum which has a Photo of the Day thread where people post their best images. It works there but it is a much busier site. Your suggestion of a voting system might work here but it also needs a system where you can view the best images. In other words the votes need to be recorded and a league table created from the votes, giving greater weight perhaps to the most recent images to avoid it become just a record of the all time best.