To take a digital photo of a picture and upload it to your computer; what someone does who doesnt have a scanner.
dude 1: Hey bro, can you scan this photo onto your computer so I can put in MySpace?
dude 2: I dont have a scanner, but i can do a ghetto scan for you! *whips out digital camera*
Using a camera phone to take a picture of another picture and uploading it to your computer.
I just ghetto scanned my ID so I could email it to your mom to prove I'm over 18.