answer:iTunes does not sync your photo library back to your machine, it’ll import photos from your desktop to the phone, but not vice versa on its own. If you use a mac, iPhoto should offer to import them back automatically if you haven’t changed settings. If you’re on a windows machine you’re on your own to either opening the photo folder on the iphone inside windows explorer and manually copying them back, or using photo library software like the windows built-in one or something like picasa.