Digital Cameras

Digital Cameras capture an image which is stored in memory instead of film. When the memory is full it can be erased and further images captured. The digital images can then be downloaded from the camera to a computer where they can be displayed, manipulated or printed.

Optical Mark Reader (OMR)

The Optical Mark Reader (OMR) can read information in the form of numbers or letters and put that information into the computer. The marks have to be precisely located as in multiple choice test papers.

Scanner

Scanners allow information such as a photo or text to be input into a computer. Scanners are usually either A4 size (flatbed), or hand-held to scan a much smaller area. If text is to be scanned, you would use an Optical Character Recognition (OCR) program to recognize the printed text and then convert it to a digital text file that can be accessed using a computer.
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Bar Code Reader

You might have seen bar codes on goods in supermarkets, in libraries and on magazines. Bar codes provide a quick method of recording the sale of items. A bar code is a pattern printed in lines of differing thickness. The system gives fast and error-free entry of information into the computer.

Magnetic Reader

This input device reads a magnetic strip on a card. Handy for security reasons, it provides quick identification of the card's owner. This method is used to run bank cash points or to provide quick identification of people entering buildings.

Voice Data Entry

This system accepts the spoken word as input data or commands. Human speech is very complex, involving emphasis and facial expressions, so complete voice recognition will not be developed for some time. However, simple commands from one user can be used to control machines. In this way a paralyzed person can operate a wheelchair or control heating and lighting.