Picasa Face Recognition can be moved to a new computer

Picasa face recognitionA few months ago my laptop spent days going through all my photos and tagging the faces, and then I spent a few more days (on and off) giving them names. It was a lot of fun, and I wrote about it here.

When my laptop ran out of space I had to move all my photos onto an external hard drive. I was nervous about losing all of that work so I wasn’t brave enough to open Picasa.

Now I have a new laptop, with plenty of space for all my photos, and so I have moved them back. The question was, did I have to do all that face recognition all over again?

The answer, I’m happy to say, is no.

Picasa keeps all of that information in a separate database. As long as you can access those files from your old computer you can use them to replace the new ones when you install Picasa on it.

Basically you need to back up:

"C:\Users\%username%\AppData\Local\Google\Picasa2"

and

"C:\Users\%username%\AppData\Local\Google\Picasa2Albums"

The first one holds face recognition data and probably much more, and the second holds your albums. I didn’t have these files backed up, but they were still on the hard drive of my old computer, and today, with the help of my new hard drive enclosure that arrived in the mail, I was able to copy them over.

I have also added everything under AppData to my Mozy backups so I don’t have this problem in the future if my hard drive fails.

Do you have your AppData backed up?

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