: iPhones and iPads use the IMG_ prefix followed by a four-digit number for photos saved to the Photos app .
: Many cameras follow the Design rule for Camera File system (DCF) , which defaults to this sequential naming style to help organize photos chronologically. IMG_0470.jpg
A picture from a discussing the 2011 Tucson Show. How to Identify Your Specific Image : iPhones and iPads use the IMG_ prefix
: Since many people upload photos without renaming them, several unrelated images on the web share this name. For example: A photo of a gravestone on a genealogy site. IMG_0470.jpg