Many people love taking photos with iPhone, and for kinds of reasons you would lost your love photos. But we can still recover them as long as you've made a backup in iTunes before, and I think it's easier to use an iPhone data recovery app to help.

Try Coolmuster Data Recovery for iPhone iPad iPod (PC/Mac), it's high quality and easy to use.
Don't know how to recover iPhone photos on computer, just have a try!

Remember don't connect your iPhone to computer, or the iTunes backup file will be updated.