My only experience of storing images in the DB goes back about 20 years - when we stored (tiny) avatars in the DB. However on further reading I learned that this was only really an option intended for people who could not set the appropriate permissions on the file system (usually because of the type of (more restrictive) hosting they might have had) and that the file system was preferred. Sure enough switching to the file system made everything feel much snappier, even on forums with just a couple thousand members.
Not sure how far DBs have come, or whether the possible bottleneck might effect you in your situation but I always remember what @joeerl said whenever I hear someone talk about storing images in a DB:
On top of that you have to consider things like back-ups, DB size, what happens if the DB becomes corrupted, etc, so personally I would avoid storing images in the DB if at all possible.
But you may be ok in your use-case if you take into account what @benwilson512 and @mindok have said above.
