The picture in and of itself is not evidence of perjury. Perjury requires that the person perjuring themselves willfully/knowingly provide false testimony under oath (like during a deposition). The key there is knowingly or willfully. It would not be very difficult to hard for a good lawyer to explain that his client who has gone on hundreds such visits or trips might have forgotten about one or two and not remembered. They could also say Blackwell just went in for a little bit to take a picture and that was it -- still an NCAA violation, but not a big deal for the civil suit if Dantonio and his lawyers say the coach didn't even remember that interaction.
Either way, my guess is that there's a lot more dirt that's going to come out and it's not going to look pretty. Glad for Fickell that he decided to pass on that one.