My iPhone 5 claims to have 1.81GB(211 photos) of storage taken by "Photo Library". How do I locate and delete these ghost images to free up my storage space?

Hello. I've had my iPhone 5 for just over a year now. I just did a factory reset on it for the first time. When I look at storage usage in my iPhone settings, or when I connect my phone to iTunes, it claims that I have 211 Photos taking up 1.81GB of my storage. I'm very confused why because I've deleted every single image I can find. I deleted Twitter, Instagram, Vine, Facebook, etc., assuming that one of these apps was storing these images somewhere. After doing a full factory reset and iCloud backup(excluding photos), I still have the 1.81GB of photos that I just cannot find. I've already tried to delete them through iTunes, unfortunately to no avail. It specifically states there is 211 photos taking up the space. Can anybody help me find these ghost images before I lose my mind??