tech+class

media type="file" key="sarah.wmv"[|scanner]

A scanner is an input device that takes in an optical image and digitizes it into an electronic image represented as binary data. This can be used to create a computerized version of a photo or illustration. A scanner can digitize anything that one can scan into a computer. There are handheld scanner that are operated by hand and not electronically. A modern scanner uses a contact image sensor as the image sensor to copy the images onto the computer. This is why scanner are very helpful to people.