Confluence Skin naturally.
With "Pic Thumbs" viewmode, Exif User Comment field could be visible on the right-pane, where the "Created" and "resolution" infos are beneath the picture.
Also with FullScreen, comment field could be visible like subtitles..
I believe this is doable in Skin level?
<label>$INFO[ListItem.PictureResolution,[color=blue]$LOCALIZE[/color] - ]</label>
What is UserComment?