Scanners

A Scanner

Scanners:

1.      A first scanner was built in 1957 by a team led by Russell A. Kirsch.

2.      The Scanner is an input device.

3.      Scanner converts scanned material into electrical pulses.

4.      Scanners essentially turn hardcopy information into digital information.

5.      It is then stored into the computer to be displayed on the screen.

6.      The document then, can be transmitted on the internet.

7.      A scanner is commonly connected to a computer USB, Parallel or SCSI port.

8.      Optical Character Recognition (OCR) software translates the scanned documents into text that can be edited.

9.      Scanners are used to enter hardcopy information (printouts or photographs) into the computer.

10.   To edit photographs, graphic software is used. For inserting a picture into a text, first scan the required picture, copy it and then paste it on the document.

11.   There are four common types of scanner:

                           i.          Flatbed Scanner,

                          ii.         Handheld Scanner,

                         iii.        Drum Scanner &

                         iv.        Slide Scanner.

Types of Scanner