Connect your iPhone to the computer and launch iTunes
Right-Click on the iPhone and select “Restore from Backup” – OR – choose the “Summary” tab in iTunes, then click the “Restore” button
Choose the appropriate backup (typically the most recent listed by the “Last Synced” time) with the name of the iPhone to restore to
Click ‘Restore’ to start the process to recover from that backup
Or You can use iMyfone Data Recovery for iPhone to recover your photos from iTunes, it is very easy-to-use. Not only photo, it can also recover contacts, messages, videos, notes an so on.!