I do know what I'm talking about.ummmm backup does NOT back up your media. so dont bother with the person who linked that post. he/she doesnt know what they're talking about.
Actually I extracted all the camera roll's photo from my itunes backup using the method dZp provided.I do know what I'm talking about.
The backup does include pictures from your camera roll. It does not however include pictures synced from iPhoto.
The OP didn't specify, so my suggestion is valid.
The problem was solved 5½ years ago.The normal method given by Apple Discussion is to recover from iTunes by connecting your iPhone to iTunes. Since your iPhone is lost, so this method does not work. However, as I know, there are some third party data recovery software can help those lose their iPhone. If your photos are precious, I suggest to recover through iPhone data recovery software. If your photos are insignificant. There is no necessary.