I believe that as long as you give credit to the source and you are not using it for monetary gain it is ok. I often save pics of LA wins on my pc until the flower bloom in my garden. After that I delete it from my pc. "I need the room to save mine !"
If it's a sdlg pic from where a seed cross come from I keep that for my records. I often request info about the sdlg from the seller. I sometimes request a pic of the sdlg if it's not posted.