Startup Idea : App that recognize number and letters in a photo

So I came up with this idea for a app or program which allows you to take a pics of any object with numbers or letters on it. The app would act as a scanner. It would read and recognize a phone in the picture or a the name of a company or business on the side of a building in the picture. The app would allow to call the number in the photo or Google the name of the company in the photo.