backup your image beforehand you dipstuff1) get a jpeg image, let's take nicholas cage here

2) open it with notepad++ (or your own software which only 0.3% of the world uses)(notepad won't work)
3) rip out random sections of the gibberish, you can remove or add for different effects, then save
4) your baby is born, congratulations

this is only a example of basic forgetery, you can go into extreme amounts of magnet on harddrive if you want to
edit: automated program, i haven't tested it though
http://snorpey.github.io/jpg-glitch/