The only reason I would put photos as BLOBs in a database would be if I had a cluster of servers, and I was using database replication to automatically copy the photos to every machine in the cluster.
Life is much simpler if you just store the photos as files, and store the filenames of the photos in the database. If you need to create unique filenames for the photos, you can use a primary key integer from the database as part of the filename. But you could also just use a hash of the photo itself, as suggested by John Milliken. That's simple, and simple is better.
